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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Free 3rd party library for showing geospatial vector information

Up to now, I have used GDAL to extract raster data from geotiffs and then, OpenGL to show that raster data. But when it comes to extract vector data with the help of OGR, what library would you ...
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9 views

C# ogrinfo with virtual vector source doesn't work GDAL 1.10

I am trying to use GDAL 1.10 with a vector virtual source which is nothing more than the example union of two shapefile layers. from the commandline, ogrinfo works fine on the source. But the C# ...
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5answers
2k views

Are there GUI resources for gdal and ogr?

For those who are new to the programming side of GIS, I feel that a lot of great tools and resources are inacessible. I am interested in GUI based wizards for handling geoprocessing with libraries ...
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1answer
16 views

Why does Spatialite layer prompt for CRS if SRID was not explicitly defined in Layer Options?

In QGIS, if I Save As... a SpatiaLite file and don't enter an SRID in Layer Options, I will be prompted for a CRS upon opening the file. Yet GDAL documentation says that this option is only for ...
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19 views

Dissolving a TIN using python/ogr binding

I have a TIN model where I remove some of the triangles (see fig. 1). Most of the triangles touch on one edge, some on one vertice. I would now like to generate a polygon shapefile containing the ...
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1answer
506 views

Latest version of ogr2ogr fails with Layer Creation

I am able to successfully run ogr2ogr to add S57 data to PostgresDB. The version I use is GDAL 1.7.0b2, FWTools 2.4.7 and release date 2010/01/19 I upgraded my version to GDAL 1.9.1 and release date ...
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1answer
32 views

Where can I find ogr_FileGDB.dll v1.4 compilled for Windows?

Since v1.3 do not have custom CRS support, where can I find the ogr_FileGDB.dll v1.4 compiled for Windows?
16
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1answer
5k views

How do I get the pixel value of a GDAL raster under an OGR point without NumPy?

I am working on a computational model of the abundance of wild pollinators across a landscape. The model itself is complete, and I am now struggling with a post-processing step. I have my GDAL ...
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30 views

GeoPandas save to shapefile issue: Unable to open EPSG support file

When I try to use to_file() to write a GeoPandas GeoDataFrame to a shapefile I get the following error. df3.to_file('~/Desktop/testout.shp', driver = 'ESRI Shapefile'); ERROR:Fiona:OGR Error 4: ...
3
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1answer
812 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 ...
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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 ...
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1answer
35 views

How add a text field and then reproject all shapefiles which are in sub folders

I have a folder and inside of that folder, I have about 500 sub folders which contain on average about 5 shapefiles each. What I want to do is: to check if there is a field, lets say field_1, and ...
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0answers
26 views

Aggregate/merge data upon insert into PostGIS (via gdal)

I am working on a project where I take a large raster file (1.5GB+), put it through a number of image-processing operations, and finally convert it to vector data. Being that the raster is large, I am ...
3
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1answer
45 views

How to re-compile ogrinfo against gdal used by QGIS?

I just solved a problem with missing libraries blocking use of ogrinfo and ogr2ogr, only to find that these utilities are garbled in one more way: whenever I run any of these, I get following error ...
4
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1answer
275 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 ...
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1answer
490 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, ...
2
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2answers
12 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 ...
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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
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1answer
508 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 ...
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1answer
27 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? ...
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28 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 ...
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1answer
31 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, ...
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31 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 ...
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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 ...
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1answer
482 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 ...
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16 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
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6answers
7k 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 ...
2
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2answers
617 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 ...
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1answer
42 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" ...
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15 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 ...
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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 ...
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2answers
90 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') ...
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36 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 ...
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2answers
62 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 ...
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1answer
43 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 ...
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2answers
203 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
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2answers
188 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
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2answers
633 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. ...
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1answer
937 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 ...
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96 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
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1answer
273 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
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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 ...
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0answers
70 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 ...
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1answer
47 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 ...
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120 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 ...
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0answers
257 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 ...
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68 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 ...
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1answer
91 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
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2answers
436 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 ...
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1answer
82 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. ...