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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4
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2answers
595 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 ...
15
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7answers
12k views

What's the easiest way to install GDAL and OGR for Python?

I am developing some code in Python, and I want to use the GDAL/OGR python bindings. What is the minimum I need to install in order to use the GDAL and OGR python bindings? What is the easiest way to ...
7
votes
2answers
794 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 ...
9
votes
7answers
11k views

Fixing corrupt shapefile?

I have a shapefile that I was working on in ArcGIS Desktop 9.3 get corrupted somehow and it gives me the error "Number of shapes does not match the number of table records.". What I would want is to ...
9
votes
3answers
4k 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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1answer
224 views

ogr / osr for node.js / javascript

I use a python module I created that does tests for point in polygon. It uses the python osgei/ogr and osr modules. Specifically, I use the following elements of these modules: ...
1
vote
1answer
66 views

Gdal+Geos point in polygon test fails under MinGW64

I have to build a grid of points and remove the points that falls inside a polygon. Polygons are defined in a ESRI shapefile, points are in a list. This is how I make the test: OGRLayer *layer = ...
2
votes
1answer
139 views

QGIS crash when I try print geometry

I do (it works): from osgeo import ogr inputds = ogr.Open(r'c:\temp.shp') inputlyr = inputds.GetLayer() for i,feature in enumerate(inputlyr): print i, feature.GetGeometryRef() Output: 0 ...
1
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1answer
113 views

What is a OGRGeometryShadow and why can't I use it in Intersects()-method?

I'm trying to script something with Python and GDAL/OGR and Shapely. What I have: two LineString geometries: "geom1" and "geom2" I made an Intersection: "intersection = geom1.Intersection(geom2)" ...
0
votes
0answers
51 views

What is the input format to the M-GEMMA map matching tool?

I am researching different map matching algorithms. Based on the Map Matching StackExchange discussion I came across the M-GEMMA tool written in C++, which can be downloaded here. A literature discuss ...
0
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1answer
37 views

Python OGR Geometry changes Floating Points

I'm creating a Polygon in OGR and adding coordinates to it in Python. It is a must that my coordinates aren't allowed to change when adding, however they do and I don't understand why. Here is my ...
0
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1answer
274 views

ogr2ogr convert DXF to GeoJSON with defined geometry

I trie to convert a DXF file into a GeoJSON file with: ogr2ogr -f 'GeoJSON' -sql "SELECT * FROM entities WHERE layer = 'geom_test'" test.json dfxtest.dxf Is it possible to convert only geometries ...
2
votes
1answer
115 views

Partial loss of projection data converting to MapInfo File with OGR

I'm trying to convert some data from ESRI Shapefile to MapInfo TAB format using ogr2ogr. The data is projected using the British National Grid (EPSG:27700). The output file is valid, and the geometry ...
3
votes
0answers
93 views

What is the area that OGR extracts from the (geometry) shp files for polygons?

The ESRI July 1998 technical documentation for polygon shapefiles at page 10 makes no mention of either area measures or length measures (apart from byte/record-layout matters). Yet OGR enables me to ...
1
vote
0answers
160 views

Loading virtual vector layer in QGIS

Can QGIS read layers in OGR's virtual vector format? It seems to work with VRT raster files, but it reports my layer is an invalid data source for vectors. http://www.gdal.org/drv_vrt.html I'm ...
2
votes
0answers
185 views

QGIS : cannot change the z-coordinate of a point shapefile using the wkb geometry format

I am using QGIS Desktop 2.5.0-Master with GDAL/OGR 1.11.0 on a windows 7. I am working on a little pyQGis script that should modify the z-coordinate of points in a vector shapefile based on a value ...
0
votes
1answer
126 views

Geoprocessing tool Difference from the Terminal?

I have used QGIS Geoprocessing tool Difference to cut polylines (SHP) into to smaller pieces using a polygon (SHP). This works very good in QGIS. Now, to speed up the process, I'd like to be able to ...
0
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0answers
42 views

OGR Virtual Format - How To Do Join

I have to kluge together a bunch of disparate data sources, and think the OGR Virtual Format may be an elegant solution. In looking at the documentation, I can't seem to find a way to join 2 layers ...
2
votes
1answer
229 views

problem transforming CRS coordinates EPSG:4269 to EPSG:3857 in python

source_srs = get_srs(shp_abs_path) source_epsg = source_srs.GetAttrValue("PROJCS|GEOGCS|AUTHORITY", 1) print source_epsg #prints 4269 target_epsg = 3857 # because these are headed to leafletjs ...
0
votes
2answers
407 views

Improving this script - GPX reading and processing with Python OGR

I am trying to plot every GPX trace I have in a folder, by reading it with Python-OGR, clipping it by a bounding box, and plotting Curently I have a working script, but it seems very uggly, and I ...
1
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1answer
71 views

how to open shp file which created by using python-ogr in qgis?

I have done following steps, so how I open that created shp file in Qgis driver=ogr.GetDriverByName('ESRI Shapefile') out=driver.CreateDataSource('pts.shp') ...
2
votes
1answer
368 views

OGR CreateLayer returns TypeError

I'm trying to create a shapefile layer based on the spatial projection of an already existing raster. (Ultimately, this will be used in gdal.Polygonize to get a shape from my raster data.) However, I ...
6
votes
4answers
2k views

Is it possible to create 3D dxf with OGR?

Does anyone know if it's possible to create a 3D dxf with OGR. I would like to assign our contour lines a z value and export them to dxf for some cad work. PS I know FME can do this, however I would ...
3
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2answers
183 views

Python, OGR and Mapnik: Possibility of passing existing ogr.Open() datasource into Mapnik without using mapnik.Ogr()?

Okay, I'm trying to modify create_utfgrids.py to use an OGR VRT file, rather than shapefiles, and while the OGR stuff in this code responds to the VRT, the Mapnik stuff is not. It's failing with.. ...
1
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1answer
399 views

How to get the mapserver WFS OGR driver to encode unicode in geojson

Running mapserver 6.4.1, gdal 1.14.3 I try to output some WFS features using outputformat=geojson. The relevant bits of the mapfile are appended below. Everything works fine, but unicode characters ...
1
vote
2answers
69 views

Ogr2ogr not executing

I am trying to run this Ogr2Ogr command but it doesn't execute when entered. What is wrong? ogr2ogr -f GeoJson -where "neighborhood IN ('Lower East Side', 'Greenwich Village', 'Columbia St', ...
0
votes
1answer
106 views

Explicitly close a OGR result object from a call to ExecuteSQL

How can I explicitly close/release the result of an ExecuteSQL statement when querying a Spatialite database with OGR via Python? I have a simple query to return the SRID of a dataset. This works as ...
4
votes
2answers
1k views

Convert KML to shapefile without losing attribute data

So I want to convert KML files to SHP shapefiles to load it onto PostGIS. Currently I'm using ogr2ogr to do the conversion for me, but it wipes out all the attribute data. How do i preserve this ...
12
votes
5answers
4k views

installing GEOS, PROJ, GDAL/OGR into a python virtualenv on Mac OS X

I am trying to setup an isolated python virtualenv to work on GIS projects on my Mac OS X. Sounds like I will need to install the GEOS, PROJ, GDAL/OGR from the kyngchaos site here ...
1
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1answer
213 views

ogr2ogr reprojection works on command line but shifts output when same command run from inside python?

Reprojection with ogr2ogr works fine on command line, but shifts the polygon to northeast when same command is run from inside python using os.system(...) Any ideas why this could be? I hard-coded ...
2
votes
2answers
489 views

Error getting ESRI Shapefile driver OGR in C++

I am unable to create an OGR Layer using the C++ API. I have followed the documentation at this link exactly http://www.gdal.org/ogr_apitut.html I get an error trying to get the shapefile driver. Any ...
0
votes
0answers
96 views

Importing OGR from OSGEO Issues

I am trying to run: from osgeo import ogr and I get: Traceback (most recent call last): File "", line 1, in from osgeo import ogr File ...
1
vote
2answers
672 views

OSX 10.9 + QGIS 2.0.1 - Missing osgeo module

Running the following: QGIS 2.0.1 (via Kyngchaos) OSX 10.9 GDAL/OGR 1.10.1 (via Homebrew). Recently, I've become unable to use the OpenLayers plugin, which is complaining that I'm missing the ...
5
votes
2answers
3k views

How can I convert a csv file of WKT data to a shape file using ogr2ogr?

This question is related to Shapefiles to Text. I have a csv file, with one column, where all the rows correspond to WKT POLYGON()'s: WKT POLYGON(...) POLYGON(...) ... I'm familiar with how to ...
1
vote
0answers
83 views

Converting MDB File With Unicode Characters

I'm using C# wrapper of GDAL and I'm having a problem converting MDB file that contains unicode characters. Lets take for example conversion to KML file, non-English characters are replaced by '?' ...
1
vote
1answer
149 views

Convert list of coordinates to OGRGeometry or WKT

I am using a Visvalingam-Whyatt simplification script and the output is a list of coordinates such: [[[[-10885205.10690245 3525662.26531131] [-10885369.01690829 3525374.0741439 ] ...
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0answers
68 views

QGIS crashes when trying to display features form MySQL

I import shapefiles into MySQL using the following command: ogr2ogr -f MySQL MySQL:GIS,host=localhost,user=root,password=root /home/user/Public/myshape.shp -nln Shape_table -update -overwrite -lco ...
1
vote
1answer
127 views

Why does this python OGR code for creating a layer and then adding a field not work?

Spot the difference! So this works... fp = "C:\\LiDAR\\MyLayer.shp" layer = "MyLayer" driver = ogr.GetDriverByName("ESRI Shapefile") data_source = driver.CreateDataSource(fp) srs = ...
2
votes
1answer
152 views

SetFeature creates infinite loop when updating sqlite feature using OGR

when using the SQLite driver in python - setting a feature after changing an attribute field value creates an infinite loop on the first record. the same code works fine if i substitute the sqlite ...
2
votes
0answers
108 views

How to export postgis points as blocks in dxf with ogr2ogr

I'm trying to export postgis points as blocks to DXF format. I have a simple table in postgis with columns: CREATE TABLE pod_com_azimuth ( ogc_fid integer, rotation double precision, pointtype ...
7
votes
2answers
751 views

Conflict between ArcPy and GDAL/OGR?

TL;DR I can't get an installation free version of GDAL/OGR to work from within ArcMap 10.0. I get an ImportError: DLL load failed on _mod = imp.load_module('_gdal', fp, pathname, description). ...
0
votes
1answer
67 views

Adding a Vertex To Exisiting Feature(linear) Using OGR Python

I am working on a project that involves finding the intersection of linears in a shapefile, if that vertex(the found intersection) doesn't already exist for each(or one) of the features, then that ...
2
votes
0answers
108 views

Can OGR handle Esri's Geodatabase extensible markup language (XML) files?

The USDA Forest Service distributes GIS data as Esri Geodatabase extensible markup language (XML) files. I downloaded one in the hopes that I would be able to convert it to something less esoteric ...
1
vote
1answer
473 views

Using OGR Intersection Method Python

I'm currently working to find the intersections between linears in a shapefile. I'm a newbie to the GDAL/OGR library. I've done some googling and came up with what seems to be a useful example(see ...
2
votes
1answer
40 views

OGR DeleteDataSource not working properly in Python

I have a small Python script which is supposed to delete a shapefile in case the file is empty. import sys from osgeo import ogr drv = ogr.GetDriverByName("ESRI Shapefile") ds = drv.Open(inData) if ...
0
votes
2answers
972 views

MultiLineString to separate individual lines using Python with GDAL/OGR, Fiona, Shapely

There are lots of MultiLineString features in a polyline shapefile. The problem is to split these lines into separate individual lines. There is a similar question with PostGIS, but I need to code in ...
1
vote
0answers
69 views

QGIS view bounding box on Add vector layer GeoGSON protocol?

Our server can serve GeoJSON with an optional bounding box HTTP parameter. e.g. http://our_gis_server.org.au/layername?bbox=xmin,ymin,xmax,ymax In QGIS I can add this vector layer as a Protocol and ...
1
vote
1answer
60 views

Extracting z values from shapefile using OGR Api

Is there an example of how we can extract the z value from a shp file given the x,y coordinate value (namely utm) using gdal/ogr c++ lib? alternatively, would it be easier if we convert the shp file ...
6
votes
1answer
610 views

Geometry errors when importing data from ESRI file geodatabase to PostGIS

When I run the following command to import by data from an ESRI fgdb to postgis... ogr2ogr -f "PostgreSQL" -a_srs "EPSG:28355" -t_srs "EPSG:3857" PG:"dbname=tp_test user=postgres port=54321 ...
0
votes
1answer
124 views

Creating an OVF file for connecting Oracle and QGIS

I'm trying to create an OGR file that can be opened in QGIS that pulls in vector data from an Oracle Database. I've tried a few combinations of things but can't seem to get anything to work. I've few ...