Well-known text (WKT) is a text markup language for representing vector geometry objects on a map, spatial reference systems of spatial objects and transformations between spatial reference systems.

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How can I get public transport maps in WKT format?

I can get street maps from openstreetmaps.org (XML) and convert it into WKT with the tool osm2wkt. There are several people creating specialist public transport maps: The Transport Map layer on ...
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Parsing XML file with hundred polygons using OpenLayers

I'm using this script but It's not working. <script type="text/javascript"> var raster = new ol.layer.Tile({ source: new ol.source.OSM() }); var xml = new OpenLayers.Format.XML(), wkt = new ...
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PyQGIS - Syntax for importing WKT file

I couldn't find any proper example of how to import a .csv with WKT coordinates (Polygon) in PyQGIS. Here are more details on my .csv. I am working with polygons. The delimiter is a semi colum, and ...
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39 views

Fix Self Intersecting Polygons Manually

I are looking to implement a method to fix self-intersecting polygons by editing the vertex order. We want to take the polygon rings and re-arrange/add in vertices to make a valid polygon. This is ...
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How to add new SRS/Projection/WKT to the GDAL database

I'm using GeoServer, OpenLayers(3.0) and the GDAL utilities. GeoServer has one (or more) SRS/Projections that is/are NOT present in the GDAL database of SRS/Projections. I can get the well-known ...
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Why does projection WKT differ between osr.SpatialReference and gdalinfo

I am writing a simple geotiff using the GDAL python bindings, but the projection WKT reported by gdalinfo differs from the source. The script from osgeo import gdal, osr import numpy # Create ...
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38 views

Parsing large GeoJson geometry to WKT

I'm reading a very large json file as an InputStream in Android with JsonReader. This json has a geometry object like so.. "geometry":{ "type":"MultiPolygon", "coordinates":[ ...
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28 views

How can I convert bytes to geometry?

Recently I have reviewed that postgreSQL provides support for Geometry objects in database. But in my old sql servers I have bytes data type for shape in database. Now I want to convert those bytes ...
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GeoServer GeoJson with coodinates in WKB?

I'm using a GeoJson query to GeoServer to update data in existing sqlite database used in an android app. The geometry column in that database is in WKB format, because like this the database is ...
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23 views

NDVI Web services over Victoria australia

Does anyone know of any web services that are available where you can pass...say a WKT polygon or point and return the mean NDVI or NDVI from that point from an array of the most recent NDVI runs?
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OSGEO/GDAL and Rotated Pole Grids

I have a netCDF containing a raster in a rotated pole grid. I have a script for converting the desired information to GeoTiff, however it requires projection information in the form of WKT string. ...
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Max length for WKT name

First of all, sorry if this is obvious or stupid questions. I am not very familiar with geographic information system. My question is, is there max length limitation on WKT name? see the bold text ...
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How are ESRI WKT projections different from OGC WKT projections?

Does anyone know the precise list of differences between esri wkt and ogc wkt projection format strings? I know there are various tools to help convert from esri wkt to ogc wkt, incl gdal utilities ...
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58 views

strange result of spatial functions postgis

I have a problem with different result of spatial functions for same geometry. For some reason result I get when I use geometry from database is different then result when I load same geometry from ...
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29 views

How to change Axis Order when transfering data from WFS to Postgis DB

I am using GeoKettle to transfer data from a WFS service to a Postgis DB. The projection of the geometries is WGS 84 : GEOGCS["WGS 84", DATUM["World Geodetic System 1984", SPHEROID["WGS 84", ...
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190 views

What is the best way to get from wkt to shapefile in Python?

I am querying tables from a SQL-Server database and would like to convert the table into a shapefile. It has wkt geometries and wkb as columns in the table, along with other attributes that need to ...
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How do you generate WKT from a graphic drawn on a map?

All, In order to do some quick analysis using SQL spatial, I'd like to generate spatial objects using the STGeomFromText / ST_GeomFromText function. With point data, I can do this by geocoding an ...
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118 views

Ideal file format for QGIS that allows mixed geometry types?

I have a spreadsheet for an archaeological project that is hosted on Google docs. This allows multiple contributors to edit and update the table as revisions and field data comes in. The table is not ...
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145 views

How to transfer a WKT string from OpenLayers to Geoserver or PostGIS?

Supposing I have created a Vector Layer in OpenLayers and then transformed it to WKT or GeoJson, how can I export it from OpenLayers, and possible import it to PostGIS or GeoServer?
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Online WKT and GeoJSON viewer

I once found a great but simple webpage that has a drop down with several text-based GIS formats such as GeoJSON and WKT, and a text box to copy/paste your data. The feature is then drawn on a world ...
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72 views

R PostGIS convert SpatialPolygon to PostGIS table

I've been having some success in scraping some webdata and converting it from HTML to spatial data as originally asked here: Parse PHP/HTML to shapefile or similar I've been using R to both fetch the ...
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111 views

Java library for reading geojson from MySQL

I am looking for a way to retrieve mysql geometry data as geojson from the database either using a java library or for converting wkt to geojson using either java or javascript. Currently I am doing ...
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Is OpenLayers compatible with OGC WKT SRS definitions?

I'm trying to use WKT in OpenLayers. Proj4js seems to have no problem with this but the OGC definition describes the units as "US survey foot" whereas OpenLayers has an INCHES_PER_UNIT definition of ...
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110 views

Convert series of WKT to Shapefile

I have seen am ability in SQL Server 2008 Spatial Tools here that saves result of query as shapefile..I am intrested in how to do this task using C#..Is there any way to do this?I found ways to ...
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241 views

Convert WKT (or geojson) geometry to numpy array of coordinates

I am looking for the fastest way to convert WKT or geojson geometry from string to numpy array of coordinates. Is it possible to do it strictly in Python and without creating geometry object such ...
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71 views

WKT: What is the reasoning behind the concept of a POINT EMPTY?

In data formats like WKT and WKB, we have ways of representing "empty" geometries. That all pretty much makes sense: a "LINESTRING EMPTY" is a LINESTRING type with 0 vertices. Same with a MULTIPOINT, ...
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extract vertices from dbgeometry value

Who knows the elegant way to extract coordinates of polygon vertices from well known text representation of DbGeometry value? Here's my polygon for example: {POLYGON ((52.808019 -1.345367, ...
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from shape files to a database [closed]

I've previously converted simple shape files to WKT so that I can store them in RDMS that has spatial capabilities. I'm a new user to QGIS, which I'm using to browse a shape file. But now I have a ...
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25 views

Failing to get wkt to reference for a multiline

I apologize, I'm quite new to WKT (and most everything else). I have a shape that I've exported to csv. & geoJson to be loaded into CartoDB. Unfortunately, the geoJson doesn't work so I am trying ...
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397 views

How can I convert WKT to SHP?

Using ArcGIS, ArcInfo and fme, I would like to transform data which contains wkt geometries (points, lines and polygons) into SHP. Has anyone a workflow for doing such a transformation?
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Is there a limit to the number of polygon points you can export to CSV in QGIS 2.4?

Using QGIS 2.4 I am currently importing a csv file with ~30,000 polygons (polygons in WKT format). I also have a United States shapefile. I have used the Clip function to get only the polygons that ...
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244 views

How to create WKT file readable by QGIS 2.4.0

I am trying to create a well-known text (wkt) file that can be imported into QGIS ver. 2.4.0 Here's a minimal working example of the geometry I wish to represent. POLYGON((-125 52, -125 21, -98 21, ...
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Transform wkb to gml geometry using FME

Maybe (and probably) this is stupid question, but I am totaly new to FME and geometry conversion. I need to transform WKB field from SQLServer to GML geometry using FME software. How can I do this?
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EPSG codes and water level datums

I'm curious if, and how, people use EPSG defined water level vertical datums such as Mean Low Water. There is specific guidance to not use the OGP EPSG definition: Remarks: Users are advised to ...
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308 views

Reproject WKT Polygon with Javascript

I have a polygon in WKT in EPSG:4326: polygonWKT = 'POLYGON((13.215179443359373 52.588032137196755,13.42803955078125 52.592620721000365,13.454132080078125 52.46897854656702,13.347015380859375 ...
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geography, geometry, distance, and wkt - PostGIS

I'm trying to understand the data conversions that happen in PostGIS when calculating distances in SRID 4326. Why is it that when I run on my marin_jobs points table: select cast (the_geom as ...
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498 views

Returning string from OpenLayers.Format.WKT write? [closed]

How to return a string from OpenLayers.Format.WKT write this.innerHTML = new OpenLayers.Format.WKT().write( layer.selectedFeatures[0] ); my full code is like this please suggest me... ...
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152 views

Shapely WKT precision/rounding

I'm using Shapely's wkt.dumps function to get WKT from geometry objects. I can't seem to find a way to limit the precision of the coordinates. Any help is appreciated.
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Using Well-Known Text and geocoding on Load

So, I have tested adding columns with the WKT format into Carto, and it has always worked great (I tried 1 row, then 1000 random rows from our data). I geocoded it on load by naming the column with ...
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Parameter values to create a vector grid with 1km x 1km cells?

I created a shapefile from WKT in QGIS using the values from this link. I want to create a vector grid with 1kmx1km cells but I can't figure out what values need to be set for the X and Y parameters. ...
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344 views

Does OpenLayers3 support WKT format?

How can i show spatial data(Point, LineString,Polygon) on bing map using openlayer3?
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How to convert this geometry location format to a qgis usable format?

I am a beginner with regard to dealing with gis information, so please bear with me. I would be obliged if someone could help. I have data on asssembly constituencies of Delhi, with these ...
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714 views

Well-known text (wkt) validator

Is there anything like http://jsonlint.com or http://geojsonlint.com for WKT? How can I validate a complex WKT string, say e.g. a Multipolygon?
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Working with WKT data in XML File in SQL Server

Anyone have experience with importing XML files into SQL server 2008 or 2012 that have a WKT element that includes the geometry for each feature? I can get this to easily work using FME software but ...
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268 views

QGIS 2.2 saving layer as CSV with GEOMETRY=AS_WKT not working

Just upgraded to QGIS 2.2 and it looks like saving a layer as CSV doesn't support GEOMETRY=AS_WKT anymore. The new Layer Options portion of the save dialog is cool but it looks like GEOMETRY and ...
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209 views

WKT for local mine grid

I have been trying to create a WKT entry to use in gdalwarp etc. I need an affine transform from coordinates in MGA94 Zone 54 to our local mine grid. All efforts have so far failed, including using ...
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122 views

How to create path based on waypoints?

I am trying to map flight paths and compare historic paths with current ones (so I later need to perform some calculations as distances between them). For this task I am using QGIS on OSX 10.9.1 As ...
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1answer
138 views

How can I convert a csv file of WKT data to a shape file using QGIS 2.01

Is it possible to create a Shapefile directly from a csv WKT file in QGIS 2.01? WKT POLYGON(...) POLYGON(...) Save as shapefile doesn't seem to work. Thanks!
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668 views

Converting wkt to geojson with OpenLayers

I am trying to convert wkt to geojson wit OpenLayers. I wrote my code based on this question (geojson to wkt). That's what I have so far, but it is not working. Any ideas? var = ...
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141 views

Using Terraformer to convert to WKT

I'm using Terraformer to parse some ArcGIS JSON into a Terraformer primitive. I'd like to store the geometry in PostGIS for other purposes. So I'm trying to use the WKT.convert tool to convert this ...