The OGR Simple Features Library is a C++ open source library (and command line tools) providing access to vector file formats.

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2
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2answers
7 views

Fusion table connexion issue

I'm trying to import some data from a SHP to GFT (Google Fusion Table). I get a 401 error. I'm using an Ubuntu 14.04 LTS Linux 64 bits with GDAL 1.11.0, released 2014/04/16. GFT is available (tested ...
11
votes
5answers
2k views

how can i convert a shapefile to lat and lon boundaries?

i have a shapefile of country subdivisions and i would like to extract an array of bounding lat and lon for each division.. is it possible to do?
2
votes
1answer
480 views

How to run OGR in ArcGIS Scripts?

When I run my script outside ArcGIS it works because during execution script uses a GDAL and OGR modules from osgeo. When I use script as a tool in ArcGIS it does not work. In PySripter I can import ...
0
votes
1answer
21 views

Using ST_LINE_INTERPOLATE_POINT in OGR and python

I'm interested in finding the midpoint on a linestring using OGR and python. This can be a line with more segments. Could I use the ST_LINE_INTERPOLATE_POINT in python using the ExecuteSQL() method? ...
0
votes
0answers
18 views

Install GDAL 2.0 on a MacOSX

Anbody knows what's the easiest way to install GDAL 2.0 on a MacOSX? The usual suspects kingchaos binary distribution and homebrew seem to be stuck on GDAL 1.11 I need support for TopoJSON feature ...
2
votes
1answer
788 views

How do you format an OGR VRT file to best convert a CSV to KML?

I am attempting to get a nice KML for simple review of POI/geocoding from a CSV. I a using ogr2ogr and a vrt. You can see the vet file below, with two attempts to get this right. Basically, the issue ...
2
votes
2answers
1k views

OSR Python testSR.ImportFromEPSG(4326) returns empty spatial reference

This is empty using Python .ImportFromEPSG(4326): import osr #this fails: testSR = osr.SpatialReference() testSR.ImportFromEPSG(4326) print testSR.ExportToPrettyWkt() #why did the import from EPSG ...
1
vote
1answer
27 views

Python ogr filter attribute SQL

I have a shapefile with 4 attribute fields (MC_ID, MC_info, C_ID, C_info). I want to change some MC_ID values selecting the features by C_info. For example: I want to set MC_ID = 2 for C_info = g19, ...
2
votes
0answers
28 views

Is GDAL/OGR (specifically CoordinateTransformation) thread-safe?

I'm using the Java bindings if it matters. I have a heavily multi-threaded program and this is one of the bottlenecks that I have in a synchronization block. If I could remove the synchronization, it ...
2
votes
3answers
1k views

How to merge several GML files into one

I have a folder of GML files that I want to be able to merge to create one GML file that I can then view. I have tried this using the code described but searching for GML in this website without ...
1
vote
1answer
435 views

GDAL - How to get geometry type of a MapInfo TAB file?

I am using the OGR MapInfo File driver to read a MapInfo TAB file. However, the function GetGeomType() returns 0 which means 'wkbUnknown` even if the features in the TAB are only multi-polygons. Is ...
6
votes
1answer
478 views

GDAL.RasterizeLayer not ported to the C# bindings?

I am trying to use the OSGeo.GDAL.Gdal.RasterizeLayer(…) from GDAL 1.9.2 and it requires some SWIGTYPE parameters: OSGeo.GDAL.Gdal.RasterizeLayer( OSGeo.GDAL.Dataset dataset, int bands, ...
1
vote
0answers
14 views

how can I get the rest attributes like ATTV, ATTL etc. using S57 Reader?

I'm using GDAL to read S57 files to display them with S52 styles, but I was unable to get the attributions like "ATTV", "ATTL"? Do you know how to get it? I have put the two supporting files, ...
16
votes
6answers
6k views

Generate points that lie inside polygon

I have polygon feature and want to be able to generate points inside it. I need this for one classification task. Generating random points until one is inside the polygon wouldn't work because it's ...
4
votes
1answer
259 views

How do I link OGR with spatialite?

Problem & Evidence: I'm trying to create a spatialite file with the code snippet below. However the outDataSource object gets assigned NoneType and all subsequent (unshown) code fails. I'm ...
2
votes
2answers
571 views

Union multiple shapefiles with overlapping shapes

I have several shapefiles that overlap and I would like to union their geometries to get rid of those overlaps. I know how to do this with OGR and Python for single geometries. from osgeo import ogr ...
1
vote
1answer
32 views

How to read GeoCSV with OGR?

I have a GeoCSV file which stores the geometry in a WKT formatted cell following this recommendation: "identifier","date","geom","value" "Dgf01","15.04.2013","POINT (52.404869 13.147457)","285" ...
0
votes
0answers
11 views

How to specify the new layer type in writeOGR{rgdal}?

There is a task that we copy some polygons into postgis using rgdal package. I noticed postgis is strict with geometry type so that the new multi-feature layer type must be specified. I tested the ...
11
votes
5answers
2k views

How to build a geographic database of GPS logs?

On our aerial wildlife surveys we typically generate dozens of GPX files, and usually convert most of them into shapefiles for display in a GIS application. GPX files are a terrific way of keeping all ...
2
votes
2answers
82 views

Creating a really large shapefile without eating all the virtual memory

I am doing something similar to below to create a really large (large than memory on my machine) shapefile: shapes = shapefile.Writer(shapefile.POINT) shapes.autoBalance = 1 shapes.field('MyId','N') ...
0
votes
0answers
30 views

How to build .vrt of shapefiles?

I've a huge number of shapefiles and I would like to create a VRT as I do with gdalbuilvrt for raster. I find here https://github.com/dwtkns/gdal-cheat-sheet that it should be possible and the format ...
0
votes
2answers
58 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 ...
0
votes
1answer
39 views

Filter OGR datasource in Python (or XML)

I'm trying to streamline the process whereby we build tiles (of ~30 layers, representing planning zone and zone-overlay boundaries). I have a strong preference for FOSS tools. A couple of our people ...
3
votes
2answers
192 views

How to make a local copy of a large WFS dataset?

We are writing a application in which a part of the job is to fetch a relatively large (>10000 features) and often updated dataset from a WFS server, store a local copy, and do geospatial analyses on ...
2
votes
2answers
172 views

How to make a movie from a ascii grid files?

Lets say I have several ascii grid files for each time step for a particular location. I would like to spit out the image for each of these ascii grid files and legend on the side bar. I also would ...
2
votes
2answers
614 views

I need to extract a specific layer from a Geospatial PDF using GDAL/OGR

I have GDAL/OGR 1.10 installed on a 64bit Windows 7 machine. I have some Geospatial PDFs that I want to crop to the outline of the map and convert to Rasters. However I cannot clip to the neatline. ...
0
votes
1answer
905 views

Why do I get an OGR error when attempting to save an edited Shapefile?

I often get an ogr error when I try to save a shapefile after working on it in Qgis ( adding features, removing, modifying attributes.. ) The error says : "OGR ERROR : Attempt to delete shape with ...
1
vote
0answers
87 views

Serving Dynamic Tiles

I want to display data (tiles and utfgrid info) inside MSSQL on top of google maps using Mapnik. I have looked into mapnik and setup a small prototype both with tilestache and also with node-mapnik ...
2
votes
1answer
253 views

QGIS 2.8.1 ogr OpenFileGDB zip format

I am experimenting with the OGR OpenFileGDB zip file format in QGIS 2.8.1 on Windows 8.1 x64 and although OGR says it can happily read the format (with a couple of Code Page warnings) I am unable to ...
0
votes
1answer
41 views

How to get unique feature count from a field w.r.t another field using ogrinfo?

We have some 40 folders which has two - three tab files in each folder. Table structure will be the same for all the tab files. What i would like to extract is Feature Count, LineNo (will be ...
1
vote
0answers
60 views

Enable LWGEOM for OGR tools (QGIS 2.8)

I am doing some scripted operations on a Spatialite DB using OGRINFO, OGR2OGR etc. in the QGIS 2.8 OSGEO4W shell. Unfortunately, LWGEOM functions such as ST_Split() are unavailable and ...
1
vote
1answer
45 views

NAD83 2011 AZ central projection

I am having trouble getting GDAL to read a file geodatabase with data projected in NAD83(2011) State Plane Arizona Central FIPS 0202. I have developed the following code: # standard imports import ...
0
votes
0answers
101 views

How to write features in file geodatabases (FileGDB) with GDAL and Python?

I am trying to copy features from a spatiallite database to a filegeodatabase. The target FileGDB already exists with the required feature classes. I am using the FileGDB-API 1.4 on Ubuntu and Python ...
2
votes
0answers
242 views

Why are OGR (MySQL / PostGIS) connections extremely slow in QGIS 2.0 - 2.8 (when compared to QGIS 1.8)?

In our project we have been using QGIS 1.8 Lisboa with a MySQL database placed on a server accessed via local network since two years. Everything is working fine and quick. The vector layers can be ...
0
votes
0answers
59 views

GDAL/OGR - Ogr_wrap.dll entry point not found

I am using the latest stable compiled binaries of GDAL 1.11 from gisinternals.com with a C# project in Visual Studio 2013 and im having some problems with the ...
0
votes
1answer
75 views

How to get projection data (.prj) of raster image using GDAL/OGR?

I start with a boundary shape-file (think U.S. states) in lat/long that I convert to some projection, and then rasterize the result as a .tif. What I need now are the raster coordinates of the ...
2
votes
2answers
406 views

create polygon adjacency matrix using python

I am trying to create an adjacency matrix from a set of polygons. That is, I have a bunch of polygons and I want to identify which polygons have a common edge or "touch" each other. Once I find this ...
2
votes
1answer
70 views

Defining projection using readOGR if the shapefile doesn't have it?

I think that by using readOGR to import a shapefile renders worthless to put proj4string to the script since if any coords are available in the shapefile, it will be transported through the readOGR. ...
11
votes
2answers
3k views

How to add custom Feature attributes to Shapefile using Python?

I am seeking a way to take an existing Shapefile that has a Feature set of 200 countries. Each country Feature has an attribute of "NAME." My objective is to create a Python script that adds an ...
17
votes
4answers
9k views

How to add attribute field to existing Shapefile via Python without ArcGIS?

I have a Python script that adds an attribute field to a Shapefile if doesn't exist. This is easy to do with ArcGIS (graphically or via Python), but I'm looking for something that doesn't depend on ...
1
vote
1answer
28 views

Most efficient way to retrieve pixel distributions inside many polygones (custom zonal stats)

I want to get the distribution of pixels from a 1 band raster that fall in each polygon of a shapefile to proceed to some statistics. I guess a zonal statistics does it in some kind of way but I need ...
1
vote
2answers
193 views

How to read ESRI File Geodatabase (FileGDB) with OGR?

I have a file ending with *.gdb. I don't know what it actually is. I also don't know what to expect inside the file. I am trying to access it with ogr. I tried with ogrinfo: ogrinfo test.gdb ERROR ...
3
votes
2answers
855 views

Join a CSV file to shapefile using gdal/ogr?

I have a shapefile with several attributes, for example YEAR, COUNTY, and AREA. I also have a CSV file with more fields that I want in the shapefile, such as POPULATION. Both the shapefile and the CSV ...
1
vote
3answers
3k views

No ogr module despite having gdal installed?

I am trying to use the mapping component of the wonderful PySAL package, but for some reason I do not have the ogr module. I was under the impression that it came packaged with gdal. Am I missing ...
1
vote
2answers
331 views

building GDAL with libKML support

I'm attempting to import a kml/kmz file generated using Google Tracks into my QGIS 2.4 system (built with GDAL 1.10). KML files currently lose all attributes, and as such I'm attempting to build GDAL ...
4
votes
1answer
527 views

ogr2ogr when importing from file geodatabase and using in Python?

I want import data from my GDB to PostGIS. It works fine on some datasets (all records -data- is imported or nothing is imported) from a gdb but just doesn't import others. I can't find any ...
3
votes
1answer
105 views

Force OGR to use specific driver for input format

How could one force ogr2ogr to use a specific format to read input files? Out of the box ogr2ogr automatically chooses from it's long list of formats, which most of the time is great. However today ...
0
votes
0answers
30 views

GDAL/OGR C++: How to connect to SQL

Using GDAL 1.11 it is possible to execute SQL commands against a OGRDataSource: But how do I connect the OGRDataSource to a SQL Database? In my case an Oracle XE 11g. I suppose the OCI drivers have to ...
0
votes
0answers
30 views

How to use cx_Oracle db connection with OGR API

I am creating ogr datasource for oracle spatial using OCI connection in pyton code successfully. I can also get the layer from the datasource and I can add new features. But I am also using ...
1
vote
1answer
146 views

dissolve polygons of GeoJSON with gdal/ogr

I have a GeoJSON with only polygons in it. I have to dissolve (merge) the polygons with the same "DN"-value. I found out that you can do it with shapefiles like this: ogr2ogr outputfile.shp ...