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I am trying to make a 1km square grid using QGIS 2.18.26.

I am using EPSG:4326. I need it to be exactly 1km square because that's how the variable data has been collected.

I am struggling to get the grid to be exactly 1km square, I have attempted using Vector Create Grid, and MMQGIS create grid layer, but I am unsure how to set the grid units to 1km square.

My best attempt, Grid has been set to the extent of the multicoloured points, preferably the grid would have 1 multicoloured point per square

nmtoken
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Lauren Emily
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  • Change the CRS of the project to a shape preserving projection, generate the fishnet in that CRS. Project the resulting data back to EPSG4326 https://gis.stackexchange.com/questions/123444/creating-fishnet-grid-shapefile-in-qgis – GBG Dec 17 '18 at 00:12
  • Do you need to work with this grid, or could you use the one froms decorations? Also, why does your basemap has to use 4326? – Erik Dec 17 '18 at 05:59
  • It might be useful to densify the grid before reprojecting back to EPSG:4326, because projected straight lines become bended in a latlon CRS. – AndreJ Dec 17 '18 at 07:33
  • I always understood that 1 degree changes length with latitude so trying to create a regular 1Km grid in WGS84 would be impossible. The dataset needs to be projected to a local coordinate system in metre units to make a regular 1km grid? – Hornbydd Dec 17 '18 at 12:02
  • @Erik the basemap doesn't have to be 4326 I was advised to use it. I have 0 experience with GIS so any tips would be useful. I need to make a grid which I can group data by for GAM analysis. – Lauren Emily Dec 17 '18 at 12:39
  • @AndreJ how would I densify the grid? Sorry if that's a silly question. – Lauren Emily Dec 17 '18 at 12:39
  • If you create the grid with Vector -> Research Tools -> Vector Grid, just run Vector -> Geometry Tools -> Densify geometries on the output layer with 49 or 99 additional vertices afterwards. And use a projected CRS like UTM. – AndreJ Dec 17 '18 at 13:25
  • 1 km =0.00899928 – Cyril Mikhalchenko Dec 17 '18 at 14:12

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