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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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. 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
8.4. GIS Book: Merge
Merge tool can be used to merge two or more entities into a single layer. All merging entities must be of the same type (points, lines or polygons). Caution should … Read more
8.3. GIS Book: Clip
The Clip tool allows you to trim part of an entity based on the perimeter of a polygonal layer (Figure 35). The polygonal layer is used to limit the extent … Read more
7.4. GIS Book: Operations
The Field Calculator performs simple and complex calculations for both text strings and mathematical operations. Note that the modifications affect all records (if none is selected) or only the selected … Read more
7.3. GIS Book: Calculation of XY coordinates
The Add XY Coordinates tool allows the values of the XY coordinates to be calculated (if the layers have the Z coordinate (height), it can also be calculated). To execute, … Read more
7.2. GIS Book: Calculation of area, perimeter and length
To calculate the area, perimeter or length of the different entities, it is necessary to take into account the geometry of each layer. First, ensure that the participant layer has … Read more
6.7. GIS Book: Project a layer to another reference system
The Project tool allows you to project spatial data from one coordinate system to a different coordinate system. Practice: A layer projected with the coordinate system “WGS 1984 UTM Zone … Read more
6.6. GIS Book: Define projection of a layer
At certain times when loading new layers into ArcMap, a warning message (“The following data sources you added are missing spatial reference information. This data can be drawn in ArcMap, … Read more
Complement for fields monitoring with Landsat-8 and Sentinel-2 images
In this opportunity we are going to show an option to carry out the activity of monitoring fields of crops through images of the satellites Landsat-8 and Sentinel-2. As indicated … Read more