A Spatial Reference System Identifier (SRID) is a unique value used to unambiguously identify projected, unprojected, and local spatial coordinate system definitions

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H2GIS and POSTGIS

i use PostGIS and H2GIS and i have tested ST_Transform function on both systems: SELECT ST_AsText( ST_Transform( ST_GeomFromText('POINT('||to_char(5873455.6,'9999999.99')||' ...
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Creating geodjango model with geometry field that can accept different projections

I am working on web application with GeoDjango and within the model (db table) RoadAxis I have geometry field or more precisely LineStringField where I need to store different polylines (road axis) ...
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How I get SRID from Geometry field

what is the function for getting SRID from Geometry field. I have inserted a shapefile into SQLServer table with Geometry field defined. I know the projection of shapefile is Swreff99_1800 ...
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1answer
517 views

Problem with writing the srsName into gml output in OpenLayers

I am trying to write out my geometry in gml format after it is drawn in OpenLayers. Actually it is working fine, I get the gml like this: <gml:Polygon> <gml:outerBoundaryIs> ...
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Transforming takes long time with st_transform

I have two shape files contains considerably large data. I exported them to my geodatabase(using arccatolog), which takes 2 days. The problem is their srid must be changed. So i tried creating new ...
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Why is there an upper limit to the SRID value in the spatial_ref_sys table in PostGIS 2.1?

I was trying to insert a reference system in PostGIS from http://spatialreference.org/, and got a constraint violation for spatial_ref_sys_srid_check. I checked that constraint and found that, when ...
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1answer
63 views

SRID, Shape2SQL and SQL Server 2008r2 query

I'm using Shape2SQL to load the Ordinance Survey's Meridian 2 map into SQL Server 2008r2 (which is working very smoothly and painlessly). According to this page ...
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set Default projection in postgis table

I've set the SRID 4326 for a table having geometry column, but when i insert a geometry without SRID, i get an error because no SRID specified is interpreted as -1 or 0, so how i can set a default ...
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which map projection should I use to calculate distance in Poland

I'm using/learning geodjango + postgis, and I'm trying to calculate distance between 2 cities in Poland. First using WGS84/4326 I define 2 points, and then after transforming this points into ...
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Postgis 2.1 Inconsistent with spatialreference.org

The County of Napa, California, uses a projection "NAD_1983_StatePlane_California_II_FIPS_0402_Feet"; for example their roads.prj file has: ...
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1answer
61 views

Calculating Distances Between Geometry Columns of Differing SRIDs

I am attempting a relatively simple task but have been running into trouble. I have two tables, one which has lat and lon points which were geocoded using google (SRID 3857) and another table which ...
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SRID is messed up when google-maps layer is added

I've some problems with using a PostGIS layer within QGIS. First of all, I had this same problem on both QGIS 2.4.0 and 2.6.1 I cannot display the Google Maps layer AND my PostGIS layer together. ...
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How to insert a GeoJSON polygon into a PostGIS table?

I need to insert a polygon from GeoJSON to my PostGIS table. This is how the SQL query looks like. INSERT INTO tablename (name, polygon) VALUES ( 'Name', ST_GeomFromGeoJSON ( { ...
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Different SRID problem

Hi here is my problem, I have two geodatabases and i import a number(large) of tables from one to another by using arccatolog(ArcGIS 10.2). However the tables and indexes created on them are imported ...
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1answer
95 views

Baidu Maps SRID?

I am making an App which will make use of Baidu maps for geofencing and other features (as the app will be released in mainland China) I am using GeoDjango, with Postgresql / PostGIS / Proj4 etc.. ...
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2answers
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PostGIS Geometry Query returns “Error: Operation on mixed SRID geometries” only for certain values

I have PostGIS table with two geometry columns, both defined with SRID 4326. I can insert into the table without problem, using the following INSERT statement (where lng and lat are values passed in ...
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Auto-reprojecting (st_transform) SRIDs in Postgis

I have a postgis table that is edited from different sources. The points added from Source 1 are in SRID 23030. The points added from Soruce 2 are in SRID 4230. I want all the points in the table ...
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How to work with SRID using PostGIS [duplicate]

I am using PostGIS with OSM Data from Geofabrik that covers the complete area of Austria. I am used to work with calissical longitude and latitude. If you enter Vienna, Austria in ...
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geodjango difficulties with srid

I'm trying to make geodjango app. I'm using SQLite and SpatialLite. I want to add shops, and be able to sort them from closest to furthest from my location. When in my model I have: location = ...
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How to choose data type and SRID, for coordinates from different sources, in a medium size zone

I'm developing an application. In the database I need to store coordinates for many places, in the north-east of Italy, but the area could expand in the future. This coordinates will come from some ...
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1answer
115 views

How to choose a SRID and what is its meaning? [duplicate]

I'm new to GIS, in PostGIS, and I'm struggling with the SRID concept. How do you choose a SRID for a database column? This is making me crazy. Why do I need to choose a SRID? What's its meaning? ...
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PostGis: Geometry from UTM text

I have plain data in a postgresql table which looks like this: ╔════╦═══════╦═════════════╦══════════════╦══════════╦═════════════════╗ ║ id ║ index ║ easting ║ northing ║ utm_zone ║ ...
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3answers
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Where to find the units for a specific spatial reference system?

I want to use the st_within function to find geometries within a specifi distance. My geometries are both in the same SRID stored in a postgis db. From what I read here: ...
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why the graphics layer coming from the Geoprocessing service in WGS_84, is projected correctly on a Web Mercator Auxiliary Sphere Basemap

I have made a Geoprocessing service, which results (features) are in wgs_84 (4326). My map's spatial reference is wgs_84 Web Mercator Auxiliary Sphere 102100 (projected system) Considering that the ...
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What does the srid code mean in an sde.st_geometry?

In case of an sql insert query like : INSERT INTO OUTBREAKS (OID, address, city_code, loc) VALUES (1, '1420 kirchestrasse', 43, sde.st_geometry (0.00003, 0.00051, null, null, 4326) ...
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How do I get the closest point on a road to a point when I have imported OSM data using osm2pgsql?

I have been trying to use OSM data to find the closest point to a road for a given point. I imported the OSM data into postgis using osm2pgsql, and I am getting results back, but they are at the ...
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57 views

geometries with different SRIDs errors (even after setting SRID)

I've looked at existing questions about this (including this one) and followed the advice that was shared there. I'm still seeing this when I run some queries: RuntimeError: Postgis Plugin: PSQL ...
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308 views

Ensuring SRID on geometry column in PostGIS

I am using a table that has a geometry type column called "wkt". Its definition in the table looks like this: create table sometable ( ... wkt geometry not null, ... ); I want to change it ...
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Adding data from PostgreSQL to Query Layer of ArcGIS for Desktop warns that given coordinate references are incompatible?

When adding data from PostgreSQL in a Query Layer I get the warning "The given coordinate references are incompatible" I have added many other layers with the same properties no problems, but I have ...
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Why does my query not run since SRID are the same?

I am running this query: SELECT source,ST_AsText(ST_ClosestPoint(roads.geom,ST_GeomFromText('POINT(22.256 39.569)'))) FROM roads ORDER BY ST_Distance(roads.geom,ST_GeomFromText('POINT(22.256 ...
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1answer
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Equal Area SRID for Finland?

Does anyone know the SRID for an equal area projection that is suitable for Finland?
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565 views

Using customized Coordinate System for Archaeological site data

I don't know so much about coordinate systems... In my office we use to deal with spatial data coming from archaeological sites. Each site has its own x-y-z coordinate system (GCS). Three simple ...
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143 views

Storing 3D Oracle sdo_geometry objects with a 2D SRID

I'm trying to understand the implications of storing 3-dimensional sdo_geometry values in Oracle when the geometry's SRID is a 2-dimensional system. The database I'm studying uses SRID 4326 (WGS84 ...
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1k views

finding the definition of missing srid in postgis

I am converting a spatial Oracle database to POSTGIS, and one of the problems I encounter is that we use SRID in Oracle that do not exist in POSTGIS. I am talking about the following SRID: 90112 : ...
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3k views

SQL Server Geometry to geography conversion

I have imported a number of Shape files from the ordnance survey using shape2SQL these have been imported as geometry however i would like to convert them to Geography and specifically to srid 4326 ...
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Is there a command line tool for converting projection in .prj and GeoTiff to EPSG codes?

Is there a command line tool to convert a shapefile projection in the .prj file into corresponding EPSG code? I know that there is website http://prj2epsg.org/search for doing this online, but I ...
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115 views

Find correct SRID

I'm learning PostGIS raster, and importing GeoTiff with raster2pgsql. This command line tool states: -s <srid> Set the raster's SRID. Defaults to 0. If SRID not provided or is 0, ...
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Looking for a pythonic way to calculate the length of a WKT linestring

I was quite unsatisfied with Calculating Length of Linestrings in WGS84 in Miles. It kept me wondering if there is a more convenient, Pythonic way to calculate the length of a WKT linestring according ...
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Shapefile PRJ to PostGIS SRID lookup table?

I was wondering if there is such a thing as an shapefile PRJ to PostGIS SRID lookup table? Something that can translate the most standard shapefile PRJ definitions into the likely SRID. When using ...
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Node.js transformation from NAD83 to WGS84

I've used the excellent npm shapefile library to import Canadian electoral districts into MongoDB. Here's a sample file: http://ftp2.cits.rncan.gc.ca/pub/geott/electoral/2011/fed308.2011.zip Is ...
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Problem with Geometry SRID in PostGIS

I ceated my table (borne) in PostGIS id_borne serial NOT NULL, num_borne character varying, shape_borne geometry I successfully changed the SRID of my table using select ...
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1answer
191 views

Adding SRID 3857 to spatial_ref_sys

My application is throwing the following error: DatabaseError: GetProj4StringSPI: Cannot find SRID (3857) in spatial_ref_sys I'm guessing (as stated above) that I need to add the SRID 3857 to the ...
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90 views

Determining a meter-based SRID

I have a set of shapefiles (Kabul, Afghanistan) that are currently in the WGS84 geographic coordinate system (GEOGCS), which I believe has a SRID of 4326. In ArcMap, this coordinate system is decimal ...
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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 ...
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Should I use a projection or not, and if so what SRID would be useful?

First off, I realize that this is perhaps not the most stackexchange-esque question. I am however having trouble finding a good source of information for this. So if there is a better place for me to ...
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152 views

Nokia HERE maps SRID

I'm just beginning with GeoDjango and just came across with term SRID. What I've understood so far is that I'd need to know a little something about the map projection to for example calculate ...
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2answers
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Storing SRID:4326 data as Geometry or Geography?

I used OGR2OGR to import SRID 4326 point data into MSSQL Server. Didn't realize that it defaults to creating a geometry column instead of detecting the data as 4326 and creating a geography column. ...
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1answer
197 views

How can I get proj4text from srtext?

I have a custom projection used in some shapes on a prj file. I want to insert this projection in the table spatial_ref_sys PostGIS. The data in the prj file will SRTEXT table field, how can I get ...
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1answer
259 views

Is it possible to get coordinate system name from SQL Server geometry type?

I need to get the name of the coordinate system of a geometry type field in SQL Server 2008 R2 (for example NAD_1983_UTM_Zone_14N or GCS_WGS_1984 or other). Is this possible?
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379 views

ESRI projection to SRID?

I am looking at MapX and MapY coordinates. The docs say they are "truncated State Plane coordinates: NAD 1983 State Plane Louisiana South FIPS 1702 (US Feet)." I am trying to reproject into a common ...