Questions tagged [calculate]

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Google Earth Engine: Calculate protected areas with WDPA dataset

I want to calculate protected areas in a region. My procedure was to convert the WDPA data set into an image and then calculate the area using the reducer.sum function. My problem is that my pixel ...
Rodriguez 's user avatar
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1 answer
79 views

Reprojecting before Calculating Area in Google Earth Engine

I want to calculate the area of forest loss in a region. Is it necessary to reproject first and, if so, is the following code for calculating the area correct? var Forest_Change = ee.Image("UMD/...
Rodriguez's user avatar
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Calculating specific sides/edges of polygons

I've a large dataset with different polygons totaling on 2372460 m2. I'm interesting in calculating the sides (in m1) of certain categories of polygons. A case would be the sides of a form of green-...
Maik's user avatar
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4 votes
1 answer
81 views

Measuring study area of elevational ranges in raster file in QGIS

I have a DEM layer with elevation ranges of -413-5593 m, just as seen below. Then I determined the altitude between 4100 and 5400 m using symbology and band rendering, got the map below and the ...
Sina Kh.'s user avatar
  • 153
3 votes
3 answers
444 views

QGIS - row numbers by location

Is there a possibility to add continuous numbers in a seperated row that based on their location? Like f.e. from north to south, or left to right. i used row_number, but the numbers seem to be ...
Marek's user avatar
  • 519
0 votes
1 answer
405 views

QGIS calculate area automatically

Is there a way to calculate area automatically when I edit a polygon? I mean, is there any function there I can use on area field and update itself when I finish editing?
Ma Fo's user avatar
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