Linked Questions

69 votes
2 answers
224k views

Reading shapefile in Python [closed]

My question is an extension of Vertical lines in a polygon shapefile. There you will see a method of generating vertical lines with respect to the bounding box, at user-defined spacing. I understand ...
Akhil's user avatar
  • 1,435
19 votes
3 answers
18k views

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

I have been trying to create a function that does basically the same thing that the QGIS "dissolve" function. I thought it would be super easy but well apparently not. So from what I have gathered ...
User18981898198119's user avatar
16 votes
3 answers
22k views

How to create polygon shapefile from a list of coordinates using python gdal/ogr?

I am trying to create a polygon shapefile from a list of coordinates using open source python tools. The following is what I have so far which was hacked together from the Python GDAL/OGR Cookbook and ...
Aaron's user avatar
  • 51.7k
2 votes
3 answers
1k views

Python: best practise to ceate a large shapefile

What is the best approach to create a create a very large shapefile (close to the max of 2GB) using python? Best approach means: robust and fast. Above all fast.
LarsVegas's user avatar
  • 2,556
2 votes
1 answer
10k views

How to create line/polygon shapefiles from geojson using gdal in Python?

I have put this together after reading How to create polygon shapefile from a list of coordinates using python gdal/ogr?, and How to write Shapely geometries to shapefiles? I am attempting to read a ...
auslander's user avatar
  • 1,567
1 vote
1 answer
4k views

Writing a shapefile using OGR, from Shapely Geometry - No feature added Error

I am trying to write a shapefile from a Shapely geometry using PyQGIS in the QGIS 2.6.0 console. Lines of code before the OGR method to write shapefile: extnt = poly.extent() # gives a QtRectangle ...
Akhil's user avatar
  • 1,435
1 vote
1 answer
3k views

Getting CRS to export shapely polygon to shapefile

I am trying to export a shapely polygon to a shapefile. I have tried this, but the CRS is missing, when I try to import it in to QGIS. The shapely polygon is from this OSMNX example but edited to work ...
william3031's user avatar
4 votes
1 answer
3k views

How best to use shapely to write a dict to a shapefile

I have created a shapely object (i.e. the_pt) for my Points & Multipoints to do a buffer analysis against another shapely object (i.e. city_pt) using: return_shapes = [] for pt in points: ...
user14696's user avatar
  • 507
4 votes
1 answer
2k views

Finding the centroid of every pixel in a raster Python

I am trying to get the centroid of every pixel in a aviris hyperspectral image (a raster) but my results are not quite as expected. The centroids don't seem to line up with the center of every pixel, ...
simplesyrup's user avatar
1 vote
2 answers
1k views

How to convert from OGR geometries (with M-values) to shapely geometries (without M-values)?

Main question Suppose I have a few OGR geometries, all of them containing M-values. Is there a generic solution that allows me to translate them to Shapely geometries without M-values? Shapely and M-...
Felipe D.'s user avatar
  • 2,679
1 vote
1 answer
444 views

Is it possible to create a shapefile from a geometry with Python?

I use a GEE asset to describe the geometry of a country. I can transform this geometry into different format such as shapely.geometry or GeoJSON: asset = 'users/bornToBeAlive/aoi_PU' aoi = ee....
Pierrick Rambaud's user avatar
0 votes
1 answer
153 views

Is there a python-module to convert data to a Shapefile (w/o GIS)?

Input data can be excel, text, whatever. I would like to produce shapefiles from data on a computer without GIS installed. Is there anything out there? Fiona seems to be such a module. Are there any ...
Alex's user avatar
  • 752
0 votes
1 answer
124 views

Creating file to analyze geometrically? [closed]

I have sets of lat/lon points for vortices in the ocean, and what I want to do is draw curves around them (they are roughly elliptical), and determine their eccentricity and orientation as they move ...
BenL's user avatar
  • 101
0 votes
0 answers
40 views

Coordinate System shows up incorrect after converting a shapely object to a shapefile [duplicate]

I am trying to convert a simple point object created using shapely to a shapefile using fiona as instructed in this post. I pretty much followed line by line except that I changed the crs as I need it ...
Bowen Liu's user avatar
  • 663