Creating a Map with ArcMap - Tufts University

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• Press OK to return to your map. This way of coloring by land use is interesting, but there are far more uses than there are colors, so you can’t really tell which parcel has which use. In fact there are far more use types than there are colors that the human eye could distinguish on a map, so this is NOT a good way to communicate land use! Symbolizing general land use Fortunately, there is a more generalized land use attribute field in the Parcels2004 data layer • Open up the attribute table again for the Parcels2004 • Note there is a CLS (class) field – right-click on the CLS name at the top of the column and choose Sort Ascending as shown here: Looking at the class codes together with the detailed use descriptions, it is fairly clear that the codes are as follows: Code and Use Standard Land Use Color R – Residential yellow C – Commercial red I – Industrial gray E – Exempt (from property taxes, indicating pink government, educational, religious, or other tax-exempt civic use) • Close the table • Right-click on the Parcels2004 layer to get its symbology properties 8
• Fill in the dialog box as you see below – note that in the Label column, you can type a label for the code and then press OK: • If you go back to the Symbology properties, you can move the classes around (e.g., to make Residential come first, etc.) by highlighting the class and using the arrow keys to the right to move it up or down. Saving layer files As you can see, it takes a lot of time to set up the data layers to be colored and labeled appropriately. If you save your map file again at this point (File-Save), you will be able to get back to your map session again very quickly, including all your colors and labels. It is also useful, however, to save layer files for individual layers, not just map files. That way, even if you are working on a completely different map session (which is likely - I start new map sessions nearly every time I use ArcMap), you can add the parcels data set and have all your preferred colors and labels appear without re-doing them all. A layer file, once saved, retains all the colors and labels you have set for a layer. Next time you want to add that layer to a map, you can simply add the layer file instead of the original data file, and it should have everything done the way you set it up originally. • To save a layer file, right-click on Parcels2004 in the table of contents, and choose Save as Layer File... • Navigate to where you want the layer file to reside and give it a meaningful name (e.g., parcel_landuse) • To use a layer file in a future map session, choose add data, but instead of adding the original data set (e.g., .shp file), add the layer (.lyr) file. • If when you add that layer file to a future map, and it doesn't draw on the map, that usually means it has lost its connection to the original data source (e.g., landuse2000.shp). To remedy this, you need to reconnect it. Right-click on the problematic layer name in the Table of contents, and choose Data – Repair Data Source...You can then navigate to the location of the original data source and reconnect. Loading a layer file There are good examples of layer files created by the folks at MassGIS for major roads and railroads. To load these layer files: 9
Page 1 and 2: Creating a Map with ArcMap Revised
Page 3 and 4: one data layer at a time and press
Page 5 and 6: layers. If you copied your basemap1
Page 7: Part 3 - Drawing a layer based on a
Page 11 and 12: • Make sure that the Label field
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Page 15 and 16: Downloading image data from MassGIS
Page 17 and 18: • If the orthophoto is below the
Page 19 and 20: you later move or zoom, remember to
Page 21 and 22: frame you want). But in the layout,
Page 23: The ability to export to a digital

Creating a Map with ArcMap - Tufts University

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