How can we calculate the area of dense and sparse vegetation from NDVI image in QGIS?

How do you calculate NDVI from an image? 4. How To Calculate NDVI? 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.  How to calculate

Converting SVG into shapefile

How to convert shapefile to SVG? Once we have the files, we need to do a few things: Consolidate all the individual shapefiles into a single file with one layer for each timestamp. Reproject the file to the desired coordinate system for display (optional) Scale the coordinates down to our desired output size. Convert the

ArcGIS 10.x Create equidistant polyline that are perpendicular to an axis

How do I draw a perpendicular line in Arcgis? Perpendicular On the Edit tab, in the Features group, click Create . Click a polyline or polygon feature template. Click Line or Polygon . Create the first vertex using one of the following methods: Constrain the new segment perpendicular using one of the following methods: How

What projection to use for many parts of the world

Which projection is suitable for whole world? Goode’s homolosine map projection was developed by John Paul Goode in 1925. One of the main key features of a Goode homolosine projection is its ability to minimize distortion for the entire world. Continents shown on Goode’s Homolosine maps are proportionally sized correctly to each other. What map

Returning lat and long of centroid point with GeoPandas

What is centroid in geopandas? property GeoSeries. centroid[source] Returns a GeoSeries of points representing the centroid of each geometry. Note that centroid does not have to be on or within original geometry. What is CRS in Geopandas? A CRS tells Python how those coordinates relate to places on the Earth. You can find the codes

How do I perform a proximity search with Postgis?

How do I find the distance between two points in PostGIS? Solutions 1) Using ST_DistanceSpheroid to Calculate the Spherical Distance Between Two Geometric Points in a Spherical Coordinate System. 2) Using ST_Distance to Calculate the Distance Between Two Geometric Points on the Projected Plane in a Projected Coordinate System. How to work with PostGIS? Sample

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