Seeing is Believing: Google Earth in Social Studies Anonymous (not verified) Thu, 03/26/2009 - 16:00
Description

Google Earth lets users see the world around them in brand-new ways. Travel to the Great Pyramids, analyze live earthquake data, compare before and after images of deforestation, or integrate literature and social studies. But how can educators use it best to improve learning? Participants in this workshop will spend the day adapting existing Google Earth tours and creating a few of their own.

Sponsoring Organization
ESSDACK
Target Audience
K-12
Start Date
Cost
$120 nonmember; $60 members; $90 associate members
Duration
Seven hours

"Mapping" Primary and Secondary Sources

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Question

Is a map always a primary source? We are having a debate. In our textbook we have a map that is compiled from various sources, so I personally believe it could be a secondary source. Help!

Answer

Librarians and archivists generally agree that a “primary source” is one produced contemporaneously by an eyewitness, participant, or someone with other direct evidence; that is, the person who makes the record is doing so out of his or her firsthand experience of the event or place. Secondary sources are produced by someone without direct experience of the event or place being recorded; secondary sources typically provide a synthesis or interpretation by an author removed from the scene. By this standard, only some maps are primary sources. First, explorer maps are primary sources: for example, maps of Hispaniola produced by Christopher Columbus and his cartographers in the 1490s are original documents created at the time of the encounter. Many other types of maps are primary sources too: the doodle map I create on the back of an envelope to show you the path from my house to the subway is a primary source; “mental maps” that individuals create of the extent of their geographical knowledge of their city or neighborhood are primary sources; maps produced in “real time” by humanitarian organizations in the field to identify the position of people needing assistance—or of the extent of the earthquake damage zone—are primary sources. Even when technology intervenes between the observer and the actual production of the cartography, (that is, the contemporaneous observer may not be the one who literally produces the map), these are primary sources: so, for example, an aerial photograph snapped by a reconnaissance plane several thousand feet overhead, and then translated by an automated cartography program into a map remains a primary source, even though one that is technologically produced. These fairly clear-cut examples aside, the waters then get muddier. A map created in 1870 by a U.S. military commander in Fort Dodge showing Native American-controlled lands in 1870 is a primary source. Even if this map is reproduced in a compilation in 2010, the map itself remains a primary source—assuming the 2010 source exactly reproduces the original without editing or redesign. But a map produced in 1965 showing what land Native Americans controlled in 1870 is a secondary source.

Most sources, not just maps, can be both primary and secondary.

A map compiled from many sources, as you describe in your question, is most likely to be a secondary source. There are two points of confusion: in the first instance, most sources, not just maps, can be both primary and secondary. In the example above, the 1965 map of 1870s Native American land control is a primary source for 1965, but it is a secondary source in relationship to the 1870s. And more confusion arises between “original” and “primary.” That is, if I produce a very clever map showing income inequality state by state, and to do so I draw on information from the General Accounting Office, the U.S. Census, as well as data tables from the U.S. Labor Bureau, I may well produce an “original” and exciting new way of showing income relationships. But, like most works of nonfiction, in order to produce this map I inevitably select bits of the original data sources for use; I use my powers of discrimination and editorial finesse, and I will layer an interpretation over the original data. I may produce an “original” work in the sense that it is a map that no one else has thought of producing, but when you pick it up to use it, it is a secondary source.

Bibliography

Lynch, Kevin. The Image of the City. Cambridge, MA: MIT Press, 1960.

Wood, Denis. The Power of Maps. New York: Guilford Press, 1992.

Yale University. Primary Sources at Yale. 2008. Accessed October 18, 2011.

John Smith Map

Video Overview

Curator Barbara Clark Smith examines John Smith’s 1612 map of a section of Virginia, asking why Smith included what he did, why he left things out, and what he hoped people who saw this map would take away from it.

Video Clip Name
JohnSmith1.mov
JohnSmith2.mov
JohnSmith3.mov
JohnSmith4.mov
Video Clip Title
Exploring the Map
What is Important?
Different Perspectives
What Questions Can Students Ask?
Video Clip Duration
5:36
6:21
4:15
3:37
Transcript Text

This is a map drawn by John Smith who was one of the first English settlers at Jamestown. And it was first published in 1612 in England. Probably what’s most interesting about the map is just to stop and think: Who did it? Who’s it for? Why is he doing it? What’s he trying to do?

It shows us the worldview of the maker, John Smith, who draws the map. And of the audience, the people in England, members of the Virginia Company, who are investors trying to make money off of this colony of Virginia, who want to hear back that this is a good investment.

It’s a good idea to start out with a few basic orienting things. What’s the orientation? What direction are we coming from? When you look carefully at this map, you’ll see that north is not at the top of the map the way it is in most maps that we’re accustomed to and that most maps at the time in Europe would’ve done. North is to the right. If you stop and think about why that is, it really captures the point of view of somebody looking at the New World from Europe.

How would you approach it? Well, you get a hint with the picture of the ship down in the bottom left. You’re coming on a ship from Europe and this is the European point of view. There are some places, which are named clearly for European figures—Cape Charles, Cape Henry. Jamestown itself, of course, is named for King James. But most of the names are not English names. And this shows how densely populated this area was in the early 17th century by Native peoples.

It tells us something about the style of life in which you live in many different groups with different names. It isn’t clear that all of these Indian groups would’ve thought of themselves as having a common identity beyond owing political allegiance to Powhatan.

Mostly it’s an effort to get information across to the investors in the Virginia Company, who are funding his explorations. The investors did give instructions to the first group of settlers and explorers, saying, “Set up your town and then travel out from there and find out everything.” He’s particularly interested in showing this as a good investment.

He shows the Indian groups that are settled in different areas in order to convince them that there are people there to trade with, people there who can live off of this land. It’s a good land; it sustains life. He’s trying to give them information, but he’s also trying to encourage them to invest more, to have faith in this colony, to support him and the other adventurers. He is trying to be accurate. It’s one of the things you always want to know. How much is this person trying to tell accurate information to the audience. Or are they trying to give a very rosy or maybe a very negative view?

Archeological work confirms that he’s pretty accurate. There seem to be villages where he indicates villages. Maps certainly have to do with laying claim to the territory. Among European powers, the country that has drawn a map of an area does that as part of saying, “this is ours.” Smith isn’t entirely claiming this area. The English have already claimed it, although the Spanish had claimed it earlier.

And as you can see from all the different groups, lots of people claimed it earlier. All these native groups, this is their land. Smith isn’t really contesting at this point whether it’s the Indians’ land or not. Knowledge of where the people are is important in order to understand how much trade can take place in this area.

It says at the top, “Virginia,” although it doesn’t actually cover all the area that the Virginia Company claims to be Virginia.

Powhatan—that’s a name of the chief, but it’s also the name for the group of people who are parts of the empire that Powhatan rules. He’s the leader and he has all these tribes whom he protects. And they pay him tribute, tax, in the form of corn, trade goods, pelts. And that’s what makes him the powerful figure that the English have to deal with.

This helps us understand why it’s limited to this area. It’s not a map of Virginia from the point of view of the Virginia colony and its aspirations to own a great deal more of the continent. And it’s not a map of Jamestown where the English people are settled. It’s a map of Senecomaca, Powhatan’s kingdom.

There’re a couple of answers we come across from the written records. One reason he’s not showing you beyond Powhatan’s area is he’s relying on Powhatan’s Indian guides. They showed him all of the area where they could go freely. When they get to the fall line, you can see that there’re other tribes—the Manahoacs, the Monocans. The Powhatan guides aren’t going to take Smith into enemy territory. So all he can do at that point is take a record and say, “This is where these other Indians are.”

We find out from records of the Virginia Company and letters from Smith and other people in England about what they’re doing and why it’s a good idea to go to Virginia. They’re basing their idea of colonization on what the Spanish did for nearly a century in Mexico and in Peru and in the Caribbean. The Spanish go and find settled Indian groups. They’d like them especially to be rich, like the Incas or the Mayas, to have gold or silver. Then the Spanish conquer them, either through warfare or through diplomatic treaties.

They try to take over at the top so all of the gold, all of the corn, all of the beaver skins, all of the wealth that normally has gone to the dominant chiefs, the Spanish want that to come to them. And they ship that out to Spain. And that’s how they get wealthy. That’s what the English think they’re going to do in Virginia.

It’s an incredibly expensive thing to colonize. The King of England didn’t put up all the money to go settle Virginia, although the King claimed the land. They chartered a private company. In this case the Virginia Company, in which you get investors and they put in money. And they decide to support John Smith and other men who are going to go out and stake a claim and explore what’s there.

The idea of landing in Jamestown is you’ll set up a little town where you can live, and from there you’ll travel out and you’ll find wealth and riches. You’ll find Indian groups with whom you can make alliances. Find out who the important political leaders are. See if you can conquer them or get them to follow you. And see if you can follow the rivers to see if you can get farther into the continent and maybe even to the other side.

Why would Smith want to tell people in England about all these different Indian groups and their names? Aren’t these Indian groups taking up all the land that the English might take up when they come over? And the answer is, initially, that’s not the way the English are looking at it.

They’re looking at it as, “These are people whose wealth we can gain, we can get their crops, the animals they hunt.” And that’s shown up in the map.

In the upper right-hand corner, there’s part of the legend describing what’s on the map. Kings’ houses are a certain size and ordinary houses are another size. Smith is showing there’re all these chiefs and that means this an important political unit. There must be some wealth here. And that’s why this is a good place to settle.

One other aspect of the map that Smith spends a lot of time on is the rivers, showing you the bends and the ups and downs—where it’s wide, where it’s narrow. And that really shows us how he expects the Europeans to enter into the country. They enter in on ships. This is also how they will be transporting the trade goods that they’re getting from these different Indian groups.

It’s very important to the English to think about how they will get wealth back to England. They’re not yet seeing America as, “Here’s a place where we’re going to go and settle and stay.“ Instead, it’s a place we’re going to go, find riches, and return those riches back to England. Some of us may live there on these little outposts such as Jamestown, but most of us will not. And certainly the investors who’re trying to make money, most of them will not actually travel. The closest they get to adventure is reading about it and looking at Smith’s map.

In the upper left is Powhatan, the chief political leader of this time period in this area. It says underneath his name “Powhatan held this state [in] fashion,” meaning he sat and held this meeting in this way. Powhatan is the one with the pipe in his hand. Tobacco ceremonies are part of the diplomacy of the Powhatan people. And he’s got the feathers on his head and he’s wearing some beads or some decoration. And he’s up on a platform. So he’s clearly the big political leader. And beneath him are other people with a fire in this house or building.

The other Indian off to right side is a Susquehannock and he looks rather different. What it says underneath is “The Susquehannahs are a giant-like people and thus attired,” or dressed like this. He’s carrying a bow. He’s carrying a club in his other hand. He’s got an Indian pelt. So he’s depicted as a hunter.

We have here images of two different Indian groups. The suggestion is that one of these groups, the Susquehannahs, are primarily hunters and that what’s important about them is this individual hunting out in the forests. What’s important about the Powhatans is that they are a political group with this important leader.

It’s worth spending some time seeing how different those images are, particularly because we know from other sources that the Susquehannahs also had a political organization. They had chiefs; they had hierarchy. And the Powhatans also hunted. And that was one of the things the English were interested in—how do we get those pelts and furs that might be worth money back in England?

It’s a question that the map presents us with. Why is one group presented this way and the other group presented that way? The map is giving information, but it’s giving selected information about these Indian groups. If we didn’t know from other sources, we might think the Powhatans weren’t primarily hunters or the Susquehannocks didn’t have political institutions.

A choice was made by the mapmaker to emphasize something about these different groups. It tells us that he saw the Susquehannahs in one way, beyond the boundaries of the settled area, out there hunting. And he saw the Powhatans another way, in terms of their political hierarchy.

Powhatan, the paramount chief or political leader of this area, has an idea when the English arrive, too. Which is, “Here’s another tribe; maybe I can add them to the group of tribes with whom I’m allied and to whom I give protection and they will pay me tribute.” So his notion is they may be a useful additional group. They have iron goods. They have guns. They have some really useful things that would make you want to ally with them. They have copper, which is a beautiful good and a good material for making pots that last longer than earthenware. It’s what anthropologists called a “prestige good.” It makes clear that you have access to powers far away. It’s really the same as the Queen of England wearing beaver coats, which show that she has connections and control over the New World.

So from the Powhatan point of view, here’s these new people and they’re kind of interesting. They seem odd because they don’t seem to have any women. It’s hard to understand groups that don’t have women. But I think it’s quite intriguing to think of John Smith on the one hand thinking, “All right, how do I get control of Powhatan and his empire.” And Powhatan thinking on the other hand, “How do I get control of John Smith and his people.” And recognizing that they need help. These are explorers; they’re not farmers. They certainly don’t know how to grow the kind of corn that is grown in North America. The main thing they know how to do is fight and draw maps and explore. The English absolutely need the Indians to help them out.

It certainly isn’t the first place they come to. They come to Cape Charles and Cape Henry and they could’ve gone anywhere up the Chesapeake Bay or any of these other rivers. They go up the river in order to make sure it’s a little bit safer from the Spanish. The Spanish are constantly patrolling the shore of the Atlantic.

Virginia doesn’t really attract the Spanish. They’re happy with their gold from South America and Mexico and the plantation economies in the Caribbean. But they don’t really want the English to get wealthy and become greater competitors. The English know that and they go up the river far enough so they’re not really exposed.

They’re also on the river in case they need to retreat from Indians. Although they expect to be at peace with the Indians and to dominate the Indians, they also know that’s not always going to be true. So they settle right on the water, but up from the coast. It’s deep enough there. It’s not so far up that big ships can’t dock there. Those ships will supply them with food, with tools, and with new settlers. They want to set up a kind of post from which ships will go back and forth to England carrying the wealth that the settlers will be gathering from the countryside.

At the very beginning, it was much less successful than they expected. They suffered immensely from diseases and also they suffered from hunger. There was a drought, so the Indians had less corn themselves than they had normally had to trade and give to the English settlers.

The other aspect was the English settlers were so unprepared to be farmers themselves. They expected both to get food from the Indians and to be able to just gather food from the forest or gather fish from the rivers. And they did do some of that, but it turned out it was a lot harder to live than they thought. So they really needed the support of the Indians.

There was this period historians call the “Starving Time.” You can imagine being an investor in England and thinking this was not a good idea.

Part of the history behind this map is to represent the area as able to sustain life. It’s been a successful settlement so far because we’ve been able to travel throughout and gather this information. Let’s reassure the investors that there’s promise here.

After looking for gold the English try lots of different resources to send back. What they really discover is that tobacco will grow and tobacco becomes this much sought-after item in the 1620s. You can get really rich off tobacco, assuming that you can control enough land and enough labor to work it. Over the next decades, as it turns out that Virginia’s going to become a plantation economy, a society which grows tobacco, it changes the relationships tremendously with the Indians.

Within a couple of decades, there are plantations up and down the James River and it causes great conflict with the different Powhatan groups because those are lands that they use. They may not live on them in settled houses, but they use them for farming or they use them for hunting or they use them to fish along the river.

And the English have no understanding of, or respect for, the Indian’s ideas of ownership and use of the land. So over time, it becomes really clear to the Powhatans that there are more and more English. They’re here to stay. They want more and more land. And so you get a series of wars in the 1620s up through 1640s, when the Powhatans are pushed back.

I would start out with point of view. When you draw the map, you have to stand somewhere and look at the area that you’re mapping. I might ask students where Smith is standing. I guess he’s standing in the Atlantic Ocean or maybe on shipboard. He’s assuming you’re approaching from Europe.

The other thing about every map is it’s a small image of a big area. So the mapmaker had to leave a lot of things out. I would ask what kinds of things got put in and maybe what got left out. For example, we could imagine other things that Smith could’ve put on his map. We could say, well, “Why did he put on the rivers, not roads?” Well, they don’t have roads. There’re certainly paths, but the way you’re going to travel is by water.

He could’ve put on the different kinds of trees or animals that lived here. Or the different kinds of soil. There’re any number of physical features that he could have emphasized. But he was really interested in all these different Native American groups. Students could speculate: Why is that what’s most important or most interesting to the people back in England? Maybe if there had been gold, he would’ve done a map showing that.

You could ask students, to put themselves in the Native Americans’ position. What kind of map would you draw? At the very least it would be turned around, and you’d have some ships coming towards you off the Atlantic instead of sailing away from you. And the English would be this little group over here in Jamestown.

It might not look too different in some ways, but instead of these Indians, they might have images of the English settlers. And it would say, “The English are a giant people and they are thus attired. They carry these odd guns. They have no women.”

Google Earth

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What is it?

Google Earth uses images obtained from satellite imagery and aerial photography to map the Earth and compliment its Google Maps tool. Users with computers that run Windows XP (and above), Mac OS X 10.5 (and above), and Linux 4.0 (and above) can download the latest version of Google Earth to their desktops for free.

Google Earth's main benefit is its ability to put the world's geographic information in the reach of students and educators, allowing them to manipulate and create their own geography-based visuals to augment historical learning. In the Showcase section, history teachers can browse through products focusing on "U.S. Presidents" or "Historical Imagery" to familiarize themselves with Google Earth.

The Google Earth for Educators site also contains classroom activities that apply geographic concepts in order to better teach history, culture, literature, and other disciplinary areas—perfect for integrating history across many other curriculum areas. This section also provides tips and tricks for using Google Earth as a teaching tool and student work showcase, as well as ideas for how to integrate Google Earth into grant projects. Of particular note is the classroom resources section, which provides a basic overview of how Google Earth can be used by history students and teachers, as well as links to lesson plans. Additionally, teachers can use the forum to discuss with fellow teachers how to use Google Earth in innovative ways.

Getting Started

The first step is to install Google Earth on computers that will be used by students. Teachers should consult with the Instructional Technology specialist at school, or at the school district office, before trying to install Google Earth on school computers.

Examining New Orleans between 2005 to the present helps students understand the destruction of Hurricane Katrina and the recovery efforts that have helped the city prosper once again.

Once installed, it can be easy to become overwhelmed with all the tools available. The historical imagery tool is a good place to begin. Google provides simple and effective web tutorials for each tool, and the tutorial video for historical imagery will help users become familiar with what can they can learn by viewing cities and how they change over time. For example, satellite images of Washington DC, dating back to 1948, reveal the growth of the Smithsonian museums and the national monuments on the Mall. As mentioned in the tutorial video, images of Las Vegas from the last 60 years reveal the city's growth and can open up conversations about urban planning, 20th-century migration to the "Sun Belt," or even Las Vegas's history of gambling and organized crime in the post-Prohibition era. Examining New Orleans between 2005 and the present helps students understand the destruction of Hurricane Katrina and the recovery efforts that have helped the city prosper once again. Another useful feature to explore is the "layers" function. After selecting a location, expand the "layers" menu on the left panel to reveal 10 categories (borders & labels, places, photos, roads, 3D buildings, ocean, weather, gallery, global awareness, and more)—eight of which contain several subcategories. The "gallery" category, in particular, provides educators with a seemingly endless list of possibilities by taking advantage of the resources provided by National Geographic, NASA, New York Times, the Discovery network and many other partners. Displaying layers of streets, landmarks, and photos, for example, would help elementary social studies teachers enrich lessons about the community in the early grades. High school teachers can use these layers to examine military battlefields such as Gettysburg, or urban areas of historical interest such as New York post-9/11. Google Earth also allows users to create new placemarks, polygram shapes, and pathways, and to import images as an overlay. In addition to using the historical imagery tool, users can also select the day/night function to visualize locales at different times of day. Other functions found on the top row include viewing selections in Google Maps, emailing Google Earth images to other people, and printing visualizations. Teachers can use these tools to email students specific geographic visuals ahead of a particular lesson or to print Google Earth images for a handout or worksheet. Finally, the recorded tour feature is helpful for student presentations and projects. Students can prepare their tour by creating historical placemarks and pathways, as well as inserting historical images as overlays. Once all the pieces are in place, they can select the "record a tour" function from the top row of menus. Students can also select layers they would like to be visible, such as the name of roads or photos, and then zoom in to their desired view. At the bottom of the screen a record button will appear to begin recording. If students would like to provide a voice recording for an audio tour, a second button is also available (note: teachers should test any built-in or plug-in microphones beforehand). The "tour" tutorial is a must-see video before working with students on developing their own tour.

Examples

Although it has bot been updated for a few years, Google Earth Lessons has quite a list of ideas on how to use Google Earth and Google Maps in the classroom. One good use for the elementary classroom is to use Google Earth to map out a "Flat Stanley" project. This can be easily modified to a treasure hunt, "where's Waldo?", or other scavenger activities. Both Google Earth and Google Maps allow students to create place marks and pathways that can follow Stanley or Waldo in their travels.

Lesson plans can also make use of geo-mapping tools like Google Earth. In "Slavery, Exploitation, and Slave Trade Routes," a 5th-grade lesson plan guides students in analyzing the slave trade. It includes a structure for developing the final product in Google Maps. From this lesson, students can create an interactive map with placemarks for key areas in the Atlantic slave trade, as well as routes for slave ships and transportation of goods between Africa, Europe, and the Americas. By inserting images that illustrate slave ship conditions and sugar mills in the Caribbean, for example, students can make good use of the tools in Google Earth.

Teachers may want to explore both Google Earth and Google Maps in order to see what each tool offers. Because Google Earth is a bit more complex for younger students and requires installation on computers, teachers may choose to use Google Maps as an alternative tool if they are planning on using basic map functions in their lesson activities.

A gallery of Google Earth products is also available for teachers and students to view and use for brainstorming project ideas.

For more information

Locate Yourself on a Map of the Americas

Teaser

Young students locate themselves on a map and explore spatial relationships among geographic features.

lesson_image
Description

Young students locate themselves on a map and explore spatial relationships among geographic features.

Article Body

This is a straightforward lesson that introduces K-2 students to the concept of geographical location and scale. Using a variety of different maps, the lesson helps students understand the way that countries are situated within continents, states within countries, and cities within states.

Designed for a single-period, the lesson begins with students identifying the continent and country in which they live. Then, students begin to move to progressively more specific scales, locating the state or district in which they live, and eventually their school. Along the way, the plan calls for discussion of the number and size of states and districts, and the relative scale of different cities and towns.

The lesson is built around National Geographic’s MapMaker kit for the Americas—part of their larger MapMaker kit collection. For first-time users, video tutorials are available, and each kit enables the user to download, print, and assemble maps of varying scales. Map sizes range from “mega maps” designed for walls to one-page outline maps designed for individual study.

The strength of this lesson is that it introduces a key concept in historical thinking: geographical location and spatial relationships. By helping students understand the relationships between and among various locations, it establishes an important foundation for students in early elementary grades to learn about historical context. The website isn’t always the most intuitive to navigate, but persistence pays off with high-quality free resources.

Topic
Geographical location and spatial relationships
Time Estimate
50 Minutes
flexibility_scale
3
Rubric_Content_Accurate_Scholarship

N/A, the focus of this K-2 lesson is geography.

Rubric_Content_Historical_Background

N/A

Rubric_Content_Read_Write

No

Rubric_Analytical_Construct_Interpretations

No

Rubric_Analytical_Close_Reading_Sourcing

Yes, requires close reading of maps.

Rubric_Scaffolding_Appropriate

Yes

Rubric_Scaffolding_Supports_Historical_Thinking

Yes

Rubric_Structure_Assessment

Assessment checks for understanding of geographical relationships, no criteria.

Rubric_Structure_Realistic

Yes

Rubric_Structure_Learning_Goals

Yes

Google Maps

Image
What is it?

Google Maps allows users to place markers, upload pictures of specific locales, draw lines and shapes, and provide descriptions—helpful for constructing historical maps or geography-based lessons.

Getting Started

Working with Google Maps is simple enough, but users will (of course) need to establish a Google account in order to create a map. After signing in, the first step is to provide the map with a title and description, as well as establish privacy and share settings; the map is already in edit mode. Text can be entered in plain or rich text—great for inserting links. Users will see three icons in the left corner of the map: a hand (navigation tool), a marker pin (with over 90 icons), and a jagged line (to draw lines and shapes). To create a marker, select the corresponding icon and select style and click on the desired location on the map. After entering a title, users can select the rich text format to not only insert hyperlinks but also add images to the marker by selecting the image's URL address. In addition, you can embed a Google Video or YouTube clip by copying the embed code and pasting it into the description field. To create a line, users can simply click at the beginning point, click at subsequent locales, and double click to finalize the desired route. Creating lines using existing roads may be a useful for tracing travel and trade routes.

Google Maps facilitates collaborative learning and helps teachers extend and refine their lessons through an interactive medium that promotes critical decision making.

Two more tool options are found at the top of the left bar, above the title of the map: "collaborate" and "import." The collaborate function—which allows users to invite others to help create and edit a map—is ideal for group projects. Teachers can also use this function to collaborate with colleagues teaching a similar course. Either way, Google Maps facilitates collaborative learning and helps teachers extend and refine their lessons through an interactive medium that promotes critical decision making. The import option allows users to add map data from a KML, KMZ, or GeoRSS file. This is a very useful tool if teachers are able to find good historical "overlays" for their maps. A brief search for historical KMZ files yielded several good imports, such as battles of the Civil War, significant cities of the Civil Rights Movement, and U.S. presidential elections (using search terms like "historical maps KMZ" or "KMZ historical places" is a good way to start . . . but the development of these types of files is still growing so it may take some searching). Google Maps does have some glitches. Creating routes using the "line drawing" tool is tricky. Starting points do not always appear where you click to select, and editing an existing route is difficult; the pointer on the screen does not always match the marker boxes designed to click and drag to a new point on the map. In creating our own map, we also ran across an interesting problem. We created a map with markers and descriptions, but when we accessed it at a later date, the information appeared but all the markers on the map disappeared. Furthermore, the links in the information panel were no longer active. We would recommend creating a database on an Excel spreadsheet first, using columns such as "latitude, "longitude," "name,", and "icon." Then you can convert the Excel document into a KML file by using an online site such as Earth Point, which does an excellent job of providing a step-by-step process on how to create a "KML-friendly" Excel spreadsheet, lists the various ways to enter longitude and latitude coordinates, provides the numbers for hundeds of different marker icons, and also has a feature where you can make the conversion on the Earth Point site. A new KML file will be downloaded onto your computer, which can then be imported in Google Maps. Voila! All the markers appear, with descriptions in place.

[Note: it is highly recommended to use the decimal format for coordinates. Excel spreadsheets only accept negative values in the decimal-coordinate format. Any location in the Western and Southern hemisphere is a negative coordinate.] Although such a process sounds tedious, we found that this extra step is useful if you want to continue editing a map, or, more importantly, if a glitch causes the information on Google Maps to disappear. You can import the KML file into your Google Map at any time and replace the old one. Consider the KML file a Google Maps "backup" file.

Examples

One good site to examine the potential of map overlays is Dave Rumsey's site. In an 1861 historical overlay, we see an old map of Washington, DC over a Google Map in Satellite View. By clicking on "Washington DC 1861" on the right, users can make the map come and go as they please. Likewise, by clicking on "transparent map", users can add and remove modern street names and locales.

Historypin is another good site to see what users can do with pin markers, photographs, and other information that can make history come alive.

Another good site to examine student-produced Google Maps projects is Google Historical Voyages and Events. By clicking on "historical events" on the left sidebar menu, several student-created projects are available for browsing. One useful starting point is to select "Major Events of the Civil War" and browse various class projects in Google Maps. "Major Events of the Civil War," a 5th-grade class project, also includes detailed for educators to gain ideas of how to use Google Maps in the classroom across grades 5-12.

For more information

Helpful tips and tutorial for users new to Google Maps.
A useful primer on KMZ and KML files.
10 minute video of how Google Apps work for the K-12 classroom.

Rare Map Collection

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A collection of more than 800 maps dating from 1544 to 1939 of mostly North American locations, with an emphasis on 19th-century Georgia. Organized into nine chronological and topical divisions—New World; Colonial America; Revolutionary America; Revolutionary Georgia; Union and Expansion; American Civil War; Frontier to New South; Savannah and the Coast; and Transportation.

Includes maps of battles, American Indian nations, railroads, and roads. Useful especially for those studying military history and the development of the South.

USC Archival Research Center Anonymous (not verified) Mon, 04/14/2008 - 11:31
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These varied collections document the history of Los Angeles and southern California. "Digital Archives" offer more than 126,000 photographs, maps, manuscripts, texts, and sound recordings in addition to exhibits. Nearly 1,200 images of artifacts from early Chinese American settlements in Los Angeles and Santa Barbara are available, as is the entire run of El Clamor Publico, the city's main Spanish-language newspaper from the 1850s. Photographs document Japanese American relocation during World War II and photographs, documents, and oral history audio files record Korean-American history. The archive also includes Works Projects Administration Land Use survey maps and Auto Club materials. A related exhibit, "Los Angeles: Past, Present, and Future", offers collections on additional topics, including discovery and settlement, California missions, electric power, "murders, crimes, and scandals," city neighborhoods, cemeteries, Disneyland, African American gangs, and the Red Car lines.