I'm seeing some strange behavior working with geojson files in newer versions of QGIS (2.18.9 and 2.18.10, but not 2.18.6) with GDAL 2.2.0 (but not 2.1.3). When I use "save as" saving to geojson or edit a geojson file and save the edits, any null values disappear. This is particularly a problem for a project I'm working on where I need to keep a standard attribute table and fill in nulls for any missing values to be updated in later. I have more details about the problem here, including example files: https://github.com/UCDavisLibrary/ava/issues/270 It's not GDAL alone that's causing the problem - I tried saving a file into geojson in the osgeo4w shell with ogr2ogr and it didn't cause the same problem.
Thanks for your help! Michele Michele Tobias, PhD GIS Data Curator Data Management Program UC Davis Library 161 Shields Library (530)752-7532 mmtob...@ucdavis.edu<mailto:mmtob...@ucdavis.edu> https://www.library.ucdavis.edu/service/data-management/
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