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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136 views

Ogr: How to add layer description to dgn?

I have created a dgn-file using Ogr, but can't find a way to fill out the description for this layer programatically. (something like _dgnLayer.Description = "Highways") opts.Add("SEED=" + ...
5
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2answers
440 views

Read an ArcGIS Feature dataset using GDAL

I am new to GDAL in Python and would like to use it to create a list of populated layers in a ArcGIS mdb Feature datasets. I have the code below that provides a list of all the populated layers but ...
5
votes
1answer
421 views

Slow FileGDB Performance in GDAL

I am attempting to write many ASPRS LAS point files into an ESRI File Geodatabase using my compilation of GDAL 1.9.2. The FileGDB driver for GDAL/OGR appears to be incredibly slow when writing large ...
4
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1answer
4k views

Convert Shapefile to MySql

I have used Grass GIS imported a .shp file; I now want to export this file to MySQL. I understood that MySQL will contain the function of all three the files necessary in a Shape file system (.shp - ...
5
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1answer
1k views

OGR Shapefile to CSV: Using Python to get WKT for multipart Polys.

Using ogr2ogr and python, I'm running into a wall with trying to create a csv with WKTs for a shapefile that contains multipart polygons. Currently this is this code I'm using (found it on interweb): ...
4
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2answers
1k views

Shape-file encoding problem in QGIS 1.9.0 (built with GDAL 1.9.2)

I have googled a lot but failed to find the answer. My configuration is: Ubuntu 11.10 Quantum GIS - 1.9.0-Master 'Master' (caae7b7) GDAL 1.9.2, released 2012/10/08 Shape-files refuse to open in ...
3
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1answer
192 views

msWFSGetFeature(): WFS server error. FLTApplyFilterToLayer() failed

I have the following code that generates a map with a couple of layers. var PIDS = ...
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2answers
335 views

How to use -where SQL in an ogr2ogr loop in GDAL/OGR (bash)?

I'm using the following code: while read line; do for att in $line; do ogr2ogr -where "newcode='$att'" -f "ESRI Shapefile" $OUTPUT/$att.shp $INDATA done done < $SCRIPT/newcodes.txt The text file ...
3
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1answer
379 views

How to stop writeOGR from abbreviating Field Names when using “ESRI Shapefile” driver

I'm currently using the following script to add some attribute data from a table to lots of individual shapefiles: library(rgdal) specieslist <- read.csv("SpeciesList1.txt", header=F) attdata ...
3
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2answers
927 views

How to Open a File Geodatabase with ogr? [duplicate]

Possible Duplicate: How to access feature classes in File Geodatabases with python and gdal? I have installed: python-2.7.msi GDAL-1.9.1.win32-py2.7.exe import ogr driver = ...
0
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1answer
994 views

How current is GDAL in Java

I have used the ogr2ogr to import various formats to Postgres and have used GDAL utilities. Is there a complete Java port for these tools? Or are they simply wrappers calling JNI to C++ code? I have ...
2
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1answer
920 views

Opening .lyr file via rgdal/OGR

According to this answer I can read in a .lyr file via OGR as long as it was made with ArcGIS version 10. I have such a file (from the ArcGIS Maps & Data page) but I can't quite make R's readOGR ...
1
vote
1answer
370 views

ogr: how to use epsg database for RD New projection?

I'm trying to assign this EPSG projection to my newly created shapefiles using ogr. The OGR Projections Tutorial says: ...any geographic coordinate system in the EPSG database can be set by it's ...
4
votes
1answer
373 views

ogr2ogr when importing from fgdb and use 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
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3answers
664 views

How to merge a large amount of polygon-features in a script?

We have a very large shapefile with over 30000 features and want to merge it with a script on a server. Currently we try it with QGIS, but the processing takes way too much time. Is there a way to do ...
2
votes
1answer
157 views

Why does ogr's CreateLayer() return None?

Why does ogr's driver method CreateLayer return None? I'm using python 2.7 with gdal 1.9.1. path = r'D:\_tempAuto' out_shp = '%s\test_OGR.shp' % (path,) driver = ogr.GetDriverByName('ESRI ...
2
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0answers
193 views

Naming layers in DXF using OGR2OGR

We have been using ogr2ogr to export data from PostGIS into DXF. Using the default behaviour of the export, all data are put into layer '0'. We would put data into a layer name from the PG table name. ...
7
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2answers
492 views

How to catch PostgreSQL/PostGIS errors in GDAL/OGR Python bindings?

Is it possible to catch PostgreSQL output error messages in OGR after a query has failed? For example conn.ExecuteSQL('SELECT * FROM non_existing_table;') In Postgres this returns an error ...
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0answers
609 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 ...
9
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1answer
404 views

Is there a way to properly have GDAL raise exceptions in Python?

I am working with GDAL in Python and have wanted to get GDAL to raise exceptions so that I can do something useful with them. For instance if a file cannot be opened with gdal.Open() I would like to ...
3
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1answer
220 views

Is there no EPSG code to use for Behrmann equal-area projection in ogr2ogr?

I'm trying to use ogr2ogr to reproject some shapefiles. The projection I wish to use is Behrmann equal-area. I cannot find an EPSG code to use for the '-t_srs' part of the syntax. Is there any way ...
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3answers
543 views

Getting Field value for a given coordinate out of ESRI Shapefile using GDAL/OGR

I have a bunch of ESRI shapefiles that contain Land Cover data across Canada (provided by Geobase). I need to query the files and obtain the value of a certain field (called COVTYPE) in a given ...
2
votes
3answers
906 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 substuting for GML in this website but to no ...
2
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1answer
453 views

TopologyException side location conflict reading MapInfo with Sharpmap

I'm using SharpMap 0.9 to read various MapInfo (.tab) files. I have used a number of files without any problem and been able to perform intersection queries on them like so: var interesectionResults ...
2
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1answer
349 views

How to create new layer within a DXF file?

Using OGR in Python, I'd like to create some geometries within a DXF file, but not in the "0" layer, but in new ones. I tried with: import ogr, os, osr, sys ds = ...
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4answers
2k views

Best way to find the polygons crossed by a line

I'm trying to find all the polygons crossed by a single line (a GPS track). I'm using the OGR library (from python) for computing this, but it's currently a bit 'brute-force' (and slow). For every ...
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2answers
130 views

“AttributeError: getZ” error when trying to get the elevation of DXF linestrings

I'm using Python and OGR to extract the elevation of lines within a DXF file. import ogr driver = ogr.GetDriverByName('DXF') datasource = driver.Open('test1.dxf', 0) layers=datasource.ExecuteSQL( ...
4
votes
1answer
261 views

ogrinfo SQL GROUP BY Clause

Does ogrinfo support a GROUP BY clauses? I could not find any good documentation of all the SQL syntax features it supports. I tried the following: ogrinfo . -geom=no -sql 'SELECT lsad FROM ...
4
votes
1answer
1k views

OGR and DXF files: Is it possible to handle layer names? (only “entities”)

I'm using Python and OGR to extract the layers of a DXF file and convert them into SHP. I began with: import ogr, os, sys driver = ogr.GetDriverByName('DXF') datasource = driver.Open('test1.dxf', 0) ...
3
votes
2answers
354 views

Eliminate small polygons from shapefile

I downloaded GTOPO30 *.DEM files, and extracted a contour line at 2000m altitude using gdal_contour. In the resulting shapefile, I have many small polygons in areas where the altitude is close to that ...
10
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1answer
432 views

OGR/GDAL threading results in low core utilization

I'm trying to process some raster data using ogr/gdal and I can't seem to get full utilization of all the cores on my machine. When I only run the process on a single core, I get 100% utilization of ...
4
votes
1answer
704 views

GEOS Python: Taking Union of several geometries

I am using the GEOS/OGR library in Python. I have files full of geometries that overlap, and I want to convert these to files of geometries that don't overlap. The way I have been approaching this ...
4
votes
1answer
995 views

How to assign OGR geometry a spatial reference when writing to a new layer using the Python API?

I'm using the Python OGR API to add new features to a PostGIS layer. However, despite setting the geometry spatial reference, when the geometry is written out the spatial reference is missing. This is ...
9
votes
3answers
3k views

Divide a complex shape file into a grid

I have a decently detailed shapefile with polygon/multipolygon features (the file is about 500mb). It's actually a shapefile of the entire world, with the features representing coastlines. I need to ...
1
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0answers
319 views

ogr2ogr failed to reproject shapefile error exceeds limits

I cannot get correct transformation from WGS84 to the Hungarian EOV EPSG:23700 (Hungarian Datum 72) using ogr2ogr. I am using ogr2ogr from the fwtools shell. I have a shapefile in GCS WGS84 (epsg ...
4
votes
1answer
478 views

ArcGIS SP4 fails to open file geodatabases created with ogr2ogr

I've been using the new FileGDB support in gdal-1.9.0 to create file geodatabases that can be opened in ArcGIS. For example (I'm doing this all on one line, so I'm not certain this will run as ...
1
vote
1answer
2k views

UnboundLocalError: local variable 'x' referenced before assignment

I am trying to execute this code, import osgeo.ogr def findPoints(geometry, results): for i in range(geometry.GetPointCount()): x,y,z = geometry.GetPoint(i) if results['north'] == ...
2
votes
1answer
177 views

Converting 2D shapefile to Equal Area Projection?

I have thousands of shapefiles with coordinates in lat/long (-180 to +180 x, -90 to +90 y), that contain polygons of which I wish to calculate the area. I'm using the Python GEOS/OGR/GDAL API. If I ...
5
votes
2answers
2k views

Point-in-polygon using Python and OGR

I want to use OGR in Python to write a simple point-in-polygon test: def point_in_polygon(point, polygon): """ point : [longitude, latitude] polygon : [(lon1, lat1), (lon2, lat2), ..., ...
2
votes
1answer
1k views

How to reproject shapefile using ogr2ogr

I have shapefile in EPSG:2834 and I want to reproject it into EPSG:4326. I am trying to use ogr2ogr in Windows; however, I get this failure output: C:\Users\Nik\Desktop\Logan_Lines>ogr2ogr -t_srs ...
5
votes
2answers
560 views

Accessing non-spatial PostgreSQL tables using OGR Python bindings

When connecting to PostgreSQL/PostGIS using the OGR Python bindings is it possible to get non-spatial table names (i.e. OGR layers) from the connection? Currently, doing: conn = ogr.Open("PG: ...
2
votes
1answer
1k views

Error getting while creating new field to a shape file table

i am getting the error for following code to add a new field to a shape file table. from osgeo import ogr # Open a Shapefile, and get field names source = ogr.Open('my.shp', 1) layer = ...
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votes
2answers
2k views

Why can't I edit KML/GML layers?

Newbie here confused by my first experience in QGIS I have a handful of lines defining a bike route. Originally they were saved in a .gml file and later translated into .kml so they could be viewed ...
12
votes
2answers
3k views

API documentation for Gdal/Ogr with C#

I want to assign projection to shapefile in my web C# application, for this i am using Gdal/OGR/OSR C# bindings and add osr_csharp.dll and ogr_csharp.dll references. But i am facing some difficulty ...
2
votes
1answer
816 views

Exporting PostgreSQL table to FileGDB: wkbUnknown layer geometry type

I'm attempting to export a PostGIS (1.5.3) database table as a File geodatabase using the new FileGDB OGR / GDAL 1.9.0 driver: $ ogr2ogr -overwrite -sql "SELECT * from db_pts LIMIT 1" \ -f ...
1
vote
1answer
652 views

GRASS v.out.dxf 3D into AutoCAD

So continuing with my last question (Create 3D dxf with OGR) I have decided to give the GRASS option a go. I have imported my polylines into GRASS using v.in.ogr and converted them to 3D using ...
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0answers
125 views

Is Django's LayerMapping capable of putting a static value into all features?

I'm using GeoDjango's LayerMapping utility to try and import a set of features. The catch is that aside from the attributes in the source layer, I want all the destination features to have the same ...
9
votes
2answers
2k views

Is it possible to get the EPSG value from an OSR SpatialReference class using the OGR Python API?

When reading a layer from a OGR PostGIS connection I can get the SpatialReference of the layer, but is it possible to get the EPSG value? Is there any documentation on this? For example: lyr = ...
4
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2answers
547 views

Issues with osgeo - qgis.core and arcpy modules

Is it possible to have the python shell from either qgis or argis to load (import) both qgis.core and arcpy? I am developing a metadata creation tool and have completed the core functionality using ...
2
votes
1answer
2k views

Projecting shapefile with transformation using OGR in python

I want to change coordinate system of a shapefile from British National Grid to WGS84 (in order to be able to convert it to KML later on). To get the best results of projecting I would like to use ...