Tip:If you're in a new session, clicking Map will open a new map. Otherwise, it will open an existing map (the last map you were using). If an existing map opens, click New Map.Your map's appearance varies based on your account or organizational settings and your browser window size. It may show the United States (such as in the example image), the world, or another extent. The only layer on the map is the basemap, which provides geographic context such as water bodies and political boundaries. The default basemap is Topographic, but your map may have a different basemap depending on your organization's settings.Above the map is the ribbon. To the left side of the map is the Details pane, which provides information about the map and its layers.
Next, you'll navigate to your area of interest. On the ribbon, in the search box, type Houston. In the list of suggested locations, click Houston, TX, USA. Note:Some ArcGIS organizations may have different default basemaps. If you don't see the Light Gray Canvas basemap, click Add and choose Browse Living Atlas Layers. Search for World Light Gray and add the World Light Gray Base and World Light Gray Reference layers. Then, in the Contents pane, click the More Options button for each layer and choose Move to Basemap.The basemap changes.
The evacuation routes stand out much more against the lighter-colored, less-detailed basemap.Navigate the mapBefore you continue, it's a good idea to explore the map and familiarize yourself with Houston's geography. With a better understanding of the area, you'll be better informed to make decisions and draw conclusions later on. Before you explore, you'll create a bookmark of the current extent so you can quickly return to it when needed. Its pop-up appears.From the pop-up, you learn the name of the route (in the example image, I-45), as well as whether the route is paved and what type of road it is.
The owner of the Hurricane Evacuation Routes layer specifically configured this pop-up to present attribute information in a clear and readable way. You'll learn how to configure pop-ups in a later lesson. Click a few route segments to view their pop-ups. When finished, close the pop-up.Add demographic dataNext, you'll determine areas of the city that are likely in need of evacuation assistance.
To do so, you'll add a layer containing demographic data by census tract. Divide counties into smaller geographic areas, which are useful for revealing spatial patterns. The new layer is listed in the Contents pane above the Hurricane Evacuation Routes layer you added in the previous lesson.Layers are drawn on the map in the same order they appear in the Contents pane. In your map, the evacuation routes are partially covered by the census tracts because the Houston Census Tract Demographics layer is above the Hurricane Evacuation Routes layer in the Contents pane (you can still see the routes somewhat because the census tracts layer is transparent). To better see the routes, you'll reorder the layers. In the Contents pane, point to the Hurricane Evacuation Routes layer, click the More Options button, and choose Move up.
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Tip:You can also reorder layers in the Contents pane by dragging them.The layers are reordered and the evacuation routes are now displayed on top of the census tracts on the map.Next, you'll look at the layer's attributes.Every layer has a table that contains all attribute data about the geographic features in the layer. You'll view the table for the Houston Census Tract Demographics layer to find data that will help you identify areas that are vulnerable during a hurricane. In the Contents pane, point to the Houston Census Tract Demographics layer and click the Show Table button. Based on the attribute you chose, several styles become available. The list of available styles is determined by your type of data, a process known as smart mapping.
In this case, the recommended smart mapping style is Counts and Amounts (Color), which is marked by a blue check mark and applied to the map. This style symbolizes each census tract with a different color based on households without a vehicle.The colors are based on a color ramp called High to Low. Census tracts with the lowest values have a light color, while those with the highest values have a dark color. The new color ramp is applied to the map.In this map, census tracts with a higher-than-average percentage of households without a vehicle stand out in blue. Based on the legend, the average percentage is about 6 percent.
A clear pattern of limited access to vehicles stands out in downtown Houston, close to the geographic center of the city. These census tracts would likely benefit the most from increased evacuation assistance, such as public transportation. In the Change Style pane, click OK. Then, click Done. In the Share window, check Everyone (public). Click Done.Create a web appYou finished your web map by adding and styling demographic data to show census tracts with a high percentage of households without vehicles.
Next, you'll use your map to create a web app. A web app is a customized user interface that enhances your map's appearance, adds (or removes) functionality, and helps you integrate the map with other media. You can choose from a variety of configurable templates, depending on how you want to display your map. You simply want to showcase your map to the public, so you'll configure a Basic Viewer app template with only a few standard navigation tools. This app shows evacuation routes and demographic data by census tract for Houston, Texas. The darker blue tracts have a higher percentage of households without a vehicle.
This pattern helps answer the question: Where in Houston should we provide evacuation assistance during a hurricane?Use the Layers and Legend tools to learn more about the data shown in the map. Click individual census tracts to see pop-up information, including the percentage of households without a vehicle.The map in this app contains a Living Atlas layer of Houston evacuation routes and a layer of Houston demographic data.
The demographic layer is styled using an Arcade expression that calculates the percentage of households without a vehicle. This information is also provided in pop-ups.
Click Save. Next, you'll replace the default thumbnail image with one that better shows your app. Doing so will allow users to get an idea of what the app contains before they open it. Generally, your thumbnail should be a JPEG, PNG, or GIF image of your map or app with a size of 600 pixels by 400 pixels.While you can capture an image with the Print Screen key or image editing software, for the purposes of this lesson you'll be provided an example image to use as your thumbnail. Save the to your computer. Click Edit Thumbnail. The thumbnail is added.
The details page is complete. You can copy the app's URL to share it with anyone.In this lesson, you created a map with a layer of hurricane evacuation routes in Houston, Texas. You added demographic data by census tract and used smart mapping to emphasize areas with limited vehicle ownership. The spatial patterns revealed in your map helped you determine where evacuation assistance is most needed in the event of a hurricane. Finally, you shared your findings by turning your map into an interactive web app.What's next? To learn more about mapmaking in ArcGIS Online, try.
To learn more about spatial analysis and problem solving, try. If you'd like to take a more detailed look at web apps, try or.You can find more lessons in the.
.This topic provides a set of links to a collection of various ArcGIS tutorials used to perform a number of common tasks in ArcGIS.Find the tutorial that you would like to work through by clicking the links in the tables below.To work through the ArcGIS for Desktop tutorials, you need to install the tutorial data from the ArcGIS for Desktop Tutorial Data setup, which is part of the ArcGIS for Desktop installation download or media. Ifthe tutorial data has been installed on your system, look for it inC:arcgisArcTutor (the default installation location).In many cases, you will need write access to that location to perform the tutorial.The ArcGIS for Server installation does not include tutorial data.
Most of the ArcGIS for Server tutorials are written in a generic way so that you can follow the steps using your own datasets.Keep in mind that these tutorials are only a starting point for you to learn about ArcGIS. You can find real-world tutorials that teach you the entire ArcGIS Platform, at the.
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