# Questions tagged [equal-area]

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### Geometric difference between equal-area and conformal projection

For simplification, let's have a source light for a map projection. I know where to put the source light in order to get an orthographic, stereographic, gnomonic map projection, but I still don't ...
113 views

### Dividing polygons into equal parts by the number of points inside

I would like to divide many polygons into 2, 3 or 4 parts. I have vectorized plants. Sometimes 2, 3 or more plants hide under one polygon. Depending on the size I just have to divide the polygon into ...
93 views

### Equal area projection of Antarctica ?

I was looking for an equal area projection of Antarctica, but it seems that the Lambert Azimuthal Equal Area (https://epsg.io/3974 , also called 102020 by ESRI) is deprecated because it is not a "true"...
50 views

### Accurate area calculation for countries worldwide individually [closed]

I have polygons of countries with its administrative divisions, I would calculate the areas of each division in a country accurately. I got the bounding boxes for each country, then I divided its ...
301 views

### Calculate area of ellipsoidal polygon with QGIS

There is online service of GeographicLib, by Karney, where one can calculate the area of ellipsoidal polygon without need of reprojection. Can one calculate the area of geometry in QGIS so as ...
68 views

### How can I use the Eckert IV projection with GeoServer WMS?

I'm trying to request a map in the Eckert IV using a WMS hosted by GeoServer. When I set srs=EPSG:54012 in my query string, I just get a sad XML response: <?xml version="1.0" encoding="UTF-8" ...
55 views

### problem converting OTF from Mercator to equal area

QGIS 1.8.0 on OSX 10.10.5: I've got continent outlines from Natural Earth that are in EPSG:4326 (degrees) plus USGS tree range data in EPSG:2030 (also degrees). When I set the project CRS to EPSG:4326 ...
44 views

### Dividing shapefile into equal area polygons using ArcMap

I am a new to ArcMap. I have a shapefile of a country state. I need to divide it in equal area polygons. How do I do that using ArcMap? I checked few online videos. It recommended using ...
31 views

### EPSG codes for projections to use when computing the area of global polygon sets in python env

The general answer to this question is "Use any equal area projection in units of meters that covers the world". Python code needed to make use of this is short and sweet: import geopandas as gpd ...
65 views

### Equal area projection

In which projection I should project a polygon of a country to get the right area in the attribute table without a distortion? For example greenland