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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13
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7answers
4k views

Free tool to simplify parcel shapefiles?

Is there any tool available which let's me run millions of parcel shapefiles and simplify them?
4
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1answer
583 views

Loading a multipoint shapefile in R

This issue has only been raised in the community once, two years ago, to the best of my knowledge. I think it's high time to raise the issue again! readOGR, from the rgdal package, cannot handle ...
4
votes
2answers
3k views

ogr2ogr srs options: where is the well known definition determined?

In the ogr2ogr documentation it says that when using -a_srs srs_def: Srs_def can be a full WKT definition (hard to escape properly), or a well known definition (ie. EPSG:4326) or a file with a WKT ...
0
votes
1answer
389 views

Creating records in output shapefile using Python

I have a list (output from a previous loop) containing attributes from an input shapefile. What I am stuck with is inputting those attributes to a new shapefile. I have plotted the point data using ...
4
votes
1answer
267 views

ogr SimplifyPreserveTopology does not keep the Topology

I use ogr2ogr to simplify a layer of polyline, from the document: -simplify tolerance: (starting with GDAL 1.9.0) distance tolerance for simplification. This method will preserve topology, in ...
2
votes
0answers
81 views

Append ArcGIS feature layer data using GDAL/OGR API

ArcGIS servers are configured with a maximum records count that they're allowed to return following a REST query. This maximum is usually 1000 records, which means that GDAL/OGR clients should ...
1
vote
0answers
141 views

SetSpatialFilter worked unexpected when using ogr by python

I am using ogr python binding to read the shapfile, this is the code: ..... bbox="POLYGON ((20.18164062 30.63867188,20.63867188 30.63867188,20.63867188 30.18164062,20.18164062 30.18164062,20.18164062 ...
1
vote
1answer
204 views

How to filter date values using OGR 1.11.0?

With OGR 1.10.1 this works: ogrinfo test2.shp -sql 'SELECT COUNT(*) FROM test2 WHERE DATE < "1970-01-01"' Note that DATE is a column of type date (not string). (Here's test data if you want to ...
1
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0answers
25 views

Asking about OFTInteger data type in OGR/GDAL?

I created the shape file by using the feature field type: OFTInteger. But when I open the file in Arcgis (ArcCatalog) the data type is: Double (not integer). Do you know how to fix this (I want it ...
2
votes
2answers
210 views

OSM linestring shown as point

I have loaded the following file http://openstreetmapdata.com/data/coastlines to postgreSQL. In visual studio with gdal/ogr and geos enabled: SELECT geom FROM waterpoly WHERE geom IS NOT NULL LIMIT ...
2
votes
2answers
96 views

How to replicate ArcGIS coordinate transformation with ogr2ogr?

I need to be able to replicate with ogr2ogr a coordinate transformation that was executed in ArcGIS for Desktop. Both ArcGIS and ogr2ogr are based on EPSG standard definition. There's not only one ...
0
votes
1answer
108 views

TileStache can't find spatial ref for vector layer

I have a query based vector layer in my TileStache configuration, and it's hitting this block of code if layer.GetSpatialRef() is None and driver_name != 'SQLite': raise KnownUnknown('Couldn\'t ...
9
votes
2answers
2k views

Processing SQLite files using ArcGIS Desktop?

I'm using qgis and grass for my work. I've produced a shapefile which is over 100mbs (s a result of some statistical analysis). If i convert it to sqlite format (spatially enabled) the data shrinks ...
0
votes
1answer
122 views

no viewable feature when creating line with ogr in python

the python code below produces the expected line shapefile viewable in QGIS import os from osgeo import ogr drv=ogr.GetDriverByName('ESRI Shapefile') if os.path.exists('test.shp'): ...
3
votes
1answer
1k views

ogr2ogr specify lat/long order on conversion to GeoJSON

When using ogr2ogr to convert a polyon from a .shp file to GeoJSON, I noticed that it writes the coordinates in order lat, long. I noticed this because whenever I tried to view the GeoJSON on a map, ...
2
votes
1answer
289 views

Ogr2Ogr: Failed to create GPX file output.gpx

When i try to export an shapefile to gpx using ogr2ogr. ogr2ogr -f GPX output.gpx D:\mypaste\input.shp -sql "SELECT Id AS name FROM layername" It gives me the following error "Failed to create GPX ...
1
vote
1answer
56 views

List the tab/shp files properties within folders/sub folders w.r.t relative folder path [closed]

Currently i am using this command line For /R "U:\01 My Proj" %f in (*.tab) do ogrinfo -al -so "%f" >>U:\New.txt to extract all the tab file related information as a text.Instead of giving the ...
0
votes
1answer
377 views

Get the outer ring inner ring for a given polygon using ogr python binding

I am trying to read the geometry of some shapefiles, now I meet some problem when I try to identify the polygon with holes, since a polygon may(or not) have one hole(or multiple holes). This is the ...
1
vote
0answers
62 views

GeoJson attributes encoding limitation

I have problem when trying to encode attribute values in latin1 using ogr GeoJson driver. Accent char are not displayed correctly. Is the geoJson encoding is limited to UTF-8? I cant find any info ...
1
vote
1answer
47 views

ogr: what is the advantage of using `geom.Clone()` over `geom`?

What is the advantage of using geom.Clone() over geom? Simple example: geom = link_feat.GetGeometryRef() newfeature.SetGeometry(geom.Clone()) # or newfeature.SetGeometry(geom) ...
0
votes
1answer
153 views

How to get feature for a given bbox from shapefile by ogr

I have some features point,line,polygon with shapefile format, now I want to get features for a given boundbox, is it possible to remove the features out of the bbox? And for a polygon, I think it is ...
1
vote
1answer
209 views

My class using ogr to calculate distance is returning incorrect results away from the equator

In an answer to this question ustroetz kindly provided some sample code for use of ogr to do lat/lon distance and point in polygon calculations. I've created a Python class based on his example to do ...
3
votes
1answer
433 views

Are the functions in OGRPolygon accessible through the python bindings?

I'm currently trying to use the OGR python bindings to process some shapefiles. I want to obtain the number of interior rings in a polygon feature. Unfortunately I'm unable to use the documented ...
3
votes
1answer
229 views

writeOGR column limit error: “Creating Name field failed”

I have a SpatialPointsDataFrame with 1057 elements and 4760 columns and want to export it to a shapefile. When I try to do this with writeOGR() I get an error: > ...
1
vote
1answer
6k views

How to clip a line layer based on polygons with QGIS?

I have a line layer and a polygon layer. Both files have the same SRS. I want in a new shape file only the lines covered by the polygons. I tried in QGIS the Vector -> Geoprocessing -> Clip ...
0
votes
4answers
611 views

Trouble converting .osm to .pbf with Osmosis

I would like to convert a shp file to map file. I know should use these steps: shp -> osm -> pbf -> map For step 1 I use a python script : ogr2osm.py For step 2 I use osmosis, but I get ...
4
votes
2answers
337 views

Need help assigning values to field using OGR in python

I've got a similar question to this one How to programatically populate a shapefile field with polygon areas in OGR?, but the solution doesn't seem to be working for me. I am trying to import a ...
1
vote
0answers
69 views

Transformation of OGR style data

I have been using GDAL/OGR in a project and it is going quite well. I have been re-projecting data from various source formats into a single CRS (using the C# bindings), but one issue I have come ...
1
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1answer
386 views

Equivalent function to shapely's envelope in ogr?

I wrote a very simple python function that gives me the envelope/bounding box/...based on two coordinate pairs (ower left and upper right corner): # ... def get_bounding_box(self, ll_corner, ...
4
votes
1answer
2k views

Import shp to Postgis using Python and ogr

I just export a Postgis Table to shp using this tips but I'm not able to import a shp to Postgis using the same library(ogr). Any idea? Thanks a lot f.
2
votes
1answer
2k views

QGIS 2.0 without MySQL connector

On a mac (Mountain Lion), after a major upgrade to GDAL (1.10) and related frameworks from KyngChaos page, QGIS 2.0 doesn't show any MySQL connector: Add Vector > Database > ... The driver ...
4
votes
1answer
482 views

How to use the OGR/GDAL configure options in QGIS python environment

I’m looking for a solution how to use the OGR/GDAL configure options (--config) in the qgis python environment. http://trac.osgeo.org/gdal/wiki/ConfigOptions Setting special configure options is ...
1
vote
1answer
214 views

ogr2ogr/python overwrite PostGIS table

Using ogr2ogr command line I can overwrite or append to an existing PostGIS table like: ogr2ogr -f "PostgreSQL"-overwrite PG:"host=myserver port=54321 user=user dbname=mydbname password=mypassword" ...
2
votes
1answer
71 views

ogrinfo returns a negative coordinate for extent of mif data file

I'm trying to get the extent of a MIF file using ogrinfo. The MIF file is supposed to be in epsg:23030 projection. This is: PROJCS["ED50 / UTM zone 30N", GEOGCS["ED50", ...
8
votes
1answer
7k views

R : convert a spatial polygon objet to spatial polygon data frame

My goal is to modify an existing shapefile by merging certain polygons. After importing the shapefile and using the UnionSpatialPolygons command, I get the polygon outline that I want. However, this ...
4
votes
3answers
2k views

PostGIS: parse geometry wkb with OGR

I'm trying to pull a LineString geometry out of PostGIS and parse it with OGR (python bindinds). from osgeo import ogr import psycopg2 connection = psycopg2.connect("...") cursor = ...
2
votes
0answers
154 views

Getting “Segmentation fault: 11” with ogr in Python

This is the code I'm trying to run: In [1]: from osgeo import ogr In [2]: datasource = ogr.Open('testdata.shp') In [3]: datasource.GetLayerCount() Out[3]: 1 In [4]: layer = ...
0
votes
0answers
125 views

GEOS assertion failed

The following script fails, if I import the 'rasterstats' library. import rasterstats import ogr geom1 = ogr.CreateGeometryFromWkt('POLYGON ((415924.806155724043492 ...
0
votes
1answer
107 views

Is it possible to get all projections form OGR?

I'm working on a project where the user can give my program so GIS data which may or may not have which projection it is using. So is it possible to get a list of all the projections from OGR or ...
1
vote
1answer
682 views

ogrinfo sql example

I'm having trouble learning how to query my shapefiles for certain features. I have a shapefile that looks something like this when I summarize it using the following command: ogrinfo -al -geom=OFF ...
5
votes
2answers
2k views

How to access Shapefile metadata using OGR?

I'm trying to use ogrinfo to get some details on a shapefile I downloaded. Currently, the only way I know how to do this is to load it into QGIS and manually click around to find any information on ...
0
votes
1answer
676 views

Will MapInfo only read PostGIS data that has been loaded via EasyLoader?

NMZ says in this thread that MapInfo will only read data in PostGIS that has been loaded by MapInfo's EasyLoader. I wasn't sure if this was still the case so I've loaded data into postgis via ogr2ogr ...
6
votes
1answer
368 views

How can I get Google Fusion Tables to work in QGIS?

I am using GDAL/OGR 1.10 and QGIS 2.0.1. I am trying to load a google fusion table into QGIS using the method mentioned in this blog post. The only difference is that I am not declaring a email and ...
2
votes
2answers
77 views

Comparing projections of two datasets when SRID not available

Similar to this question: How to test if two GDAL datasets are in the same projection? However, the above does not cover cases where an SRID is not available. It can often be the case that an SRID is ...
2
votes
3answers
428 views

Shapefile with overlapping polygons: calculate average values

I have a very big polygon shapefile with hundreds of features, often overlapping each other. Each of these features has a value stored in the attribute table. I simply need to calculate the average ...
1
vote
1answer
246 views

How can I use the proj string in java code?

I want to do projection from UTM/oblique mercator CRS to WGS84. And I know the solution to use a proj.4 string in commandline like+proj=omerc +lat_0=51.4 +lonc=7 +alpha=-10 +k=1 +x_0=0 +y_0=0 +gamma=0 ...
2
votes
1answer
390 views

Why does OGR driver.Open() for File Geodatabase give AttributeError: NoneType object has no attribute Open?

There are a number of existing Questions that hint at a possible Answer to this Question, but none seem to be providing me with the solution to my problem: How to access feature classes in file ...
2
votes
0answers
270 views

How to compile QGIS with Oracle Spatial support for Linux?

I compiled it on Fedora and Ubuntu, but got error "Cannot get Oracle select dialog from provider." while trying to add Oracle layer. Packages in repositories don`t have oracle spatial support. Can ...
0
votes
1answer
44 views

Debug/Improve Performance of GRASS v.in.ogr

I'm trying to import shapefiles (in this case, OpenStreetMap data) into GRASS (grass70-svn) using v.in.ogr; and it is painfully, brutally slow. At first I thought this was because I was using the ...
2
votes
0answers
460 views

OGR-Driver GML axis order handling (GDAL, QGIS)

By default the OGR-Driver will swap the axis order to longitude, latitude for geographic coordinate systems. "Since OGR 1.8.0, the GML driver has coordinate system support. This is only reported ...