Linked Questions

1
vote
1answer
3k views

Dissolve using GDAL/OGR?

I'm trying to dissolve a shapefile according to a field using Python 2.7.10 and I don't want to use ArcPy. Is there any way to do this using GDAL/OGR?
9
votes
1answer
9k views

Rasterize a shapefile with Geopandas or fiona - python

I need to rasterize a really simple shapefile a bit like this http://tinyurl.com/odfbanu. Which is just a shapefile coutaining counties in the US.I have seen this previous answer : GDAL RasterizeLayer ...
0
votes
0answers
64 views

Writing only one of the input vector fields to output vector using Fiona/ Python?

I'm working on a function to perform operations on folders of vector files. These files might have differing attribute fields but there will be a common field between them. I'm using fiona in python ...
8
votes
1answer
1k views

Cleaning large Shapefile using v.clean in order to dissolve features?

I'm having real problems cleaning up and reducing the size of a Shapefile which is published by the UK's Environment Agency. It shows the extents of the LiDAR open data they publish: each polygon is ...
0
votes
1answer
830 views

How to polygonize raster file according to band values?

I want to polygonize a raster by using GDAL in python. I found this webpage below: https://pcjericks.github.io/py-gdalogr-cookbook/raster_layers.html#polygonize-a-raster-band But it creates a polygon ...
0
votes
1answer
293 views

Dissolving polygons based on multiple attributes with Python (shapely and fiona)?

I would like to dissolve a polygon shapefile based on two different fields, using Python and open source libraries. I'm just able to dissolve the shapefile using one single field, with Gene's answer ...
26
votes
4answers
39k views

How to write Shapely geometries to shapefiles?

Can someone demonstrate a simple way to write geometry data-structures from shapely into shapefiles? I am particularly interested in polygons with holes and linestrings. It would also be beneficial to ...
2
votes
0answers
104 views

Dissolving polygon shapefile in Python without ArcPy? [duplicate]

I need to figure out a way to dissolve a polygon in Python using other modules besides ArcPy. I've been using the Python GDAL/OGR for merging shapefiles but I don't see anything to dissolve a polygon. ...
0
votes
1answer
1k views

Combining GeoJSON Features

I haven't been able to find a solution with the source so am trying to work on the output file. I have also asked this question on SO I have a large (200MB) geoJSON file that has a lot of complex ...
2
votes
2answers
319 views

CRS problem between QGIS and fiona / OGR

I have a really annoying problem working with QGIS for visualization and python (fiona / OGR) for the actual operations. I am, by example, doing a simple dissolving operation with fiona. The input is ...