Due to the significant processing times when calculating really small zones, we don't provide anything less than 3 meters. However, you can use the free software QGIS to create grids of any size.
To begin, download one of the geotifs available from FarmLens, in this case I'll be working with the recently added "Raw Calculated Index" file:
If this file isn't available to you currently, you can use the re-export workflow to get the data attached to your flight output.
- Open QGIS and either drag-and-drop the image from your file browser onto the blank canvas on QGIS or use the "Add Raster Layer" button:
- Now depending, on how you have your projection preference set, your data may be rendering in Psuedo Mercator (Latitude/Longitude for Y/X coordinates), the box in the bottom right will identify the projection, in my case I'm in the Psuedo Mercator (EPSG:4326):
For our purposes, we'll want UTM as units are in meters. To do the conversion follow this article and from now on you'll see that I am working in EPSG:32653 and the units will be in meters:
- From the menu click "Vector" -> "Research Tools" -> "Vector Grid"
- From the window, you'll want to (1) set the "Grid extent" by clicking the dots at the far right and either selecting a portion of your image by selection or selecting the "Canvas/Layer Extent". I suggest using the "Canvas/Layer Extent" as this will encapsulate your whole image, just be sure in the "Select Extent" pop-up, you select your loaded file, rather than the default "Use canvas extent" (I'll be using the "Select extent on canvas for speed"). (2) Type your X/Y Spacing, since my projection is 32653, the units are in meters, so I'll be typing "1" for both values. (3) You'll want to set the output "Grid" to "Save to File":
Now click "Run". You should then see your grids appear on top of your image:
- The name of your shapefile (when rendered) is "Grid", you can always change that name by right-clicking on it, but the file is named whatever you set it to in the previous step.
You'll now be able to use this grid to calculate statistics like average, which I explain how to do in THIS ARTICLE