Category: Geographic Information Systems

How to visualize 3D model in ArcGIS?

How do I view 3D in ArcGIS? For a planimetric view of your data, choose Geography from the Preview drop-down list on the Preview tab. After you’ve enabled the ArcGIS 3D Analyst extension in ArcCatalog, you can use the 3D View tools to navigate around your data in 3D. How do I make a 3D

Random points with QGIS

How do I add random points in QGIS? Steps to Create Random Points Inside Polygon on QGIS Open or create a new polygon layer. Go to Vector | Research Tool | Random Points Inside Polygon. Select the polygon layer as the Input layer. Choose the sampling strategy. Set the minimum distance between points (optional) Hit

Improving performance of Eliminate tool in ArcGIS Pro?

How do I improve my ArcGIS Pro performance? Web tool performance tips Use layers for project data. Use data local to ArcGIS Server. Write intermediate data to memory. Preprocess data used by your tasks. Add attribute indexes. Add spatial indexes. Use synchronous rather than asynchronous. Avoid unneeded coordinate transformations. How do I improve performance in

Calculating NDWI in Erdas IMAGINE 2014

How is NDWI calculated? NDWI = (G-NIR)/(G+NIR) The Normalized Difference Water Index (NDWI) is derived from the Near-Infrared (NIR) and Green (G) channels. This formula highlights the amount of water in water bodies. How do you calculate NDVI and NDWI? NDVI = (NIR – Red) / (NIR + Red) Higher the value of NDVI reflects

Converting proximity from PIXEL distance to GEOmetric distance in QGIS

How to do proximity analysis in QGIS? Quote from video: As a value we can choose byte. What is proximity raster distance in Qgis? The proximity algorithm generates a raster proximity map indicating the distance from the center of each pixel to the center of the nearest pixel identified as a target pixel. Target pixels

Counting pixel values of NDVI

How do you calculate NDVI area? NDVI is calculated with the following expression: NDVI = (NIR-Red) / (NIR+Red), where NIR is near-infrared light and Red is visible red light. There’s a great number of free online GIS tools that allow you to instantly calculate NDVI. 

Delete rasters added by script

How do I delete raster in ArcMap? Click the Raster Cleanup menu on the ArcScan toolbar and click Start Cleanup. Click Erase Selected Cells to erase the cells or Fill Selected Cells to paint over the selected cells with the foreground color. How do I remove raster from mosaic Arcpy? Launch ArcCatalog or ArcMap and

Horizontal Raster Stretch Legend

How do I make my legend horizontal in GIS? Making It Horizontal Right-click on the legend, and click Properties. Click on the Items tab. Highlight/select the layers you want to display with a horizontal legend, and then click Style. Choose which horizontal style you want to use. Optionally, click on the Properties button to customize

Snapping two polygons together in GIS

How do you snap two polygons in Arcgis? Click the Snapping menu on the Snapping toolbar and click Use Snapping. Click the buttons on the Snapping toolbar to perform point, end, vertex, or edge snapping. These snap types are enabled by default. Click the Snapping menu to enable other snapping types. How do I merge

Importing ECEF WGS84 into ArcGIS Desktop?

How do I import GPS coordinates into ArcGIS? Import Coordinates Click the Importbutton on the Coordinate Conversion pane. Navigate to a . csv file containing coordinates, and click Open. Use the X Field (Longitude) drop-down to choose the field from the . Optionally, check the Use two fields check box if your coordinates are in

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