on January 20, 2023
Creating contours from DEM with ArcPy?
Geographic Information SystemsHow do you turn DEM into contours? Note: Start ArcMap. Load the DEMs files you want to filter. Load data in the map if necessary. On the main menu, click Customize > Toolbars > Production Contouring. Click the Create Contours button. If necessary, type a value in the Base Contour text box. Type a value
on January 20, 2023
Help interpreting Moran’s I and Geary’s C results
Geographic Information SystemsHow do you interpret Moran’s I results? If the values in the dataset tend to cluster spatially (high values cluster near other high values; low values cluster near other low values), the Moran’s Index will be positive. When high values repel other high values, and tend to be near low values, the Index will be
on January 20, 2023
ArcGIS Python Script, Calculate Field
Geographic Information SystemsHow do I calculate fields in ArcGIS? Right-click the layer or table you want to edit and open its table. Right-click the field heading for which you want to make a calculation and click Field Calculator. How do I calculate a field based on another field in ArcGIS? Procedure In ArcMap, right-click the selected layer
on January 20, 2023
Creating NDVI from multispectral imagery?
Geographic Information SystemsWhat is the formula for calculating NDVI from multispectral imagery? NDVI = (NIR-R) ./ (NIR + R); % [In this step I couldn’t use / to compute, could you tell me why?] How do I create an NDVI image? Now, let’s go through the steps for how to create an NDVI map. Enable Image Analysis
on January 20, 2023
Rendering 3D images from 2+ imagesets + DEM in QGIS
Geographic Information SystemsWhat are the steps to make 3D map from DEM? 4. Create 3D Map View In QGIS, go to View menu >> New 3D Map View. In the 3D Map 1 window: click the Configure button. Elevation: select your DEM or the hillshade. Make any changes to the other settings if you want. In the
on January 20, 2023
Importing XML data into ArcGIS Desktop?
Geographic Information SystemsHow do I import an XML file into ArcGIS? Import an XML workspace document Open the Import XML Workspace Document geoprocessing tool. For the Target Geodatabase, browse to the geodatabase where you want to import your data. Choose your XML workspace document for the Import File parameter. Select whether to import data and schema, or
on January 20, 2023
Characterizing polygons that are created when joining 2 vector layers
Geographic Information SystemsWhat is a vector layer and what is its characteristics? A vector layer is a layer that allows you to edit lines that have already been drawn. You can change the brush tip or brush size, or change the shape of the lines using handles and control points. You can use the following tools on
on January 20, 2023
Simple pixel analysis
Geographic Information SystemsHow do you explain pixels to a child? What are pixels? Pixels, or picture elements, are the smallest points of visual components on a digital image. They may be dots, lines, or other kinds of shapes. On a digital screen, the colors of pixels are made by combining a mix of blue, green, and red.May
on January 20, 2023
Add new value combination to unique values, many fields symbology in Arc
Geographic Information SystemsHow do I combine values in Symbology in ArcGIS Pro? To group values together into one symbol class, follow these steps: While pressing the Ctrl key, click multiple symbol class rows from the table to select them. Right-click the Value or Label cell of one of the selected values and click Group values. to combine
on January 20, 2023
Seeking USA electric transmission powerlines as shapefiles?
Geographic Information SystemsHow many transmission lines are there in the US? The U.S. electric transmission network consists of about 700,000 circuit miles of lines. Most of the lines operate using alternating current (AC), which is how power is typically generated and delivered to end-use customers. What is the highest voltage power line in the US? In the