Shapefile export-import workflow

[surkova]

I'm working on a project that allows export of drawn geometries as shapefile and import of shapefiles for presentation on the map.

Right now I'm trying to implement the workflow when you can draw a feature, export it as shapefile, drag'n'drop it on the page again and it will be imported.

For shapefile export I'm using shp-write library, which is dependent on your lib, and shapefile-js for import. When the latter is trying to parse dbf file created by your library, I receive "Offset is outside the bounds of the DataView" in latest Chrome (there must be at least one property present for the feature in geojson, but it's another bug).

I have tried to open exported shapefile in QGIS and save it again, then shapefile-js library has no troubles parsing the created dbf. So I guess there's some difference between the dbf created by javascript vs. dbf created by QGIS. Any ideas where the bug might be?

[stollc]

I'm having the same issue. Any solution for this?

[surkova]

@stollc unfortunately no 👎

[kriscarle]

I got this error when one of my fields was not in the supported types, meaning detected in JavaScript as typeof string, boolean, or number. In my case, I had an object inside my GeoJSON properties that I needed to stringify.

When it doesn't detect the type, the buffer size attempts to multiple by a NaN and ends up being empty, causing the DataView to allocate 0 bytes, therefore writes to the DataView are outside of bounds.

[mrumeau]

In the shp-write library, there is an error when setting the terminator of the dbf header.
line 2882, replace view.setUint8(fieldDescLength - 1, 13) by view.setUint8(32 + fieldDescLength - 1, 13)