11. GIS Book: Frequently asked questions
Which zone do I select if my study area shares two UTM zones? What you usually do in this case is work with the UTM zone that contains most of … Read more
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10.3. GIS Book: Export and print a map
Once the mapping process is complete, a map can be printed or exported in various formats. To print the map, go to File > Print menu, and configure the printer … Read more
10.2. GIS Book: Map design
It is impossible to transpose the real world onto a map, so that anyone who picks up a map has no option but to believe in it. The cartographer is … Read more
10. GIS Book: Design and publication
Mapping can be a laborious process until you get the right result. Viewing data to analyze and interpret spatial information on a computer is one thing, but printing a map … Read more
9.6. GIS Book: Map algebra
The raster layer calculator (or simply raster calculator) is created to run algebraic expressions using various tools and operators through the interface of a simple calculator tool (Raster Calculator tool). … Read more
9.5. GIS Book: Contour creation
Contours are lines connecting points of equal value that represent continuous phenomena (Huisman & A. de By, 2009). Contours are called isolines, but may also have specific terms depending on … Read more
9.4. GIS Book: Reclassifications
The Reclassify tool allows the values of a raster to be reclassified; that is, it replaces the current values of each cell with new information. Data can be reclassified from … Read more
9.3. GIS Book: Creation of slope maps
Slope is the main factor that determines and differentiates the shapes of the relief. Given two points of different altitudes, the slope of the terrain is understood to be the … Read more
9.2. GIS Book: Digital elevation models
A Digital Elevation Model (DEM) is a raster representation of a continuous surface. It usually refers to the earth’s surface, using a set of points whose X, Y and Z … Read more
9. GIS Book: Spatial analyst
Spatial analysis is the process of modeling and obtaining results through computer processing and then examining and interpreting the results of the model. Spatial analysis is useful for assessing suitability … Read more
8.5. GIS Book: Dissolve
This tool unifies geographic information on the basis of an attribute; in other words, it merges information that shares an identical value within the attribute table. Figure 37 shows that … Read more