1. What is the issue? Please be detailed.
Hello. I am developing a crowdsourcing app where users are going to validate the polygons on the map in the woods to which they can navigate in the map and they will validate, if there was any specific forest cut or similar occurence. The polygons were made with remote sensing and are primarily shapefiles but I can also export them as geojson.
2. What steps can we take to reproduce this issue?
Please recheck my xls file
3. What have you tried to fix the issue?
I searched for tutorials of how to import the polygons as geojson and although I manage to import the file correctly, later unfortunately it never works when I open the app. I tried with polygons and I tried with points as well and I
always get some specific error. I tried with CSV as well and it also does not work.
4. Upload any forms or screenshots you can share publicly below.
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You forgot it. Could you share your geojson too, or at least a part of it ?
Maybe it simply contains non simple geometries...
download: because I cannot upload geojson file I renamed the file to .json; but actually it is .geojson file and you need to rename the file back once you downloaded it!!! dimbokro_poly - Copy.json (78.1 KB)
The problem was really that my polygons were Multipolygons and I was able to change them to normal Polygons with QGIS using ,,Multipart to Singlepart" Tool. However this tool works only if you use it on already exported .GEOJSON file.
2.The .GEOJSON file needs to have ID and TITLE columns in the array table! and you need to specify them in the xls file in the parameters column as follows: value=id, label=title
Furthermore the appearance needs to be set on maps
To be able to see the polygons in the map you need to specify the coordinate system of the .GEOJSON file. The EPSG: 4326, which shows longitude and latitude in the positions is the right one.