Land Use Data in HDMapper™
Q: How can I show the Land Use classifications in HDMapper?
A: With TAP6.0.2202 or later and a Maintenance Subscription date of November 30, 2007, or later, TAP systems that include the Land Use module can display the land use data file values in HDMapper.
Note that all values in this example are for demonstration purposes only. You should determine appropriate settings for your application.
For example, suppose you have a map displayed as shown. Click the “Create layer file for Land Use” button:
When you use the function, the program creates a shapefile layer defined by the current extent of the map. You can use the zoom and pan functions in HDMapper to define exactly the area you want.
If the map has been saved, the default location for the shapefile layer containing the Land Use information will be written into the same folder where the map has been saved. If the map has not been saved, you will be prompted about saving the map to a temporary location:
Saving the file to a temporary location is intended as a convenience if you are looking at a map for a quick idea of what the area is like. If you want to use the Land Use information layer later you should cancel the operation, save the map, then create the Land Use layer.
When you click OK, you will be prompted for a shapefile (.SHP) name and location to use. You can enter a path and file name, or you can use the Browse button (“…”) to navigate to a folder and specify the file name you want:
If you want to automatically add the Land Use layer to the current map, click the “Add layer to map” checkbox. You can uncheck the box if you want to create the layer without adding it to the map. That shapefile layer can be used later.
If the shapefile already exists (as is often the case if you use the temporary location and a generic file name like “Land Use.SHP”) you will be prompted about replacing the file.
If you do not want to lose the existing file, click Cancel and enter a different file name.
Depending on the size of the area, it may take several seconds to create the file:
When the file has been created it is added to the map (assuming the “Add to map” box was checked):
You can use the HDMapper legend functions to change the colors and layer order to display the information that is of interest to you:
For example, setting layers like “Urban Areas” or Counties as transparent or cross-hatched fill, and moving the Land Use layer to the bottom of the legend can help you see the relationship between the content of the various layers.
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Copyright 2007 by SoftWright LLC