A spatial reference system (SRS) or coordinate reference system (CRS) is a coordinate-based local, regional or global system used to locate geographical entities.
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25 views
If I've given two different layers the same CRS, why won't they overlay one another?
I have a "towns" and "state" shapefile for Massachusetts as two separate vector layers in QGIS. I've set the project coordinate system to WGS 84 at the bottom of the screen (next to the "coordinate" ...
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23 views
Datums in compound CRSs
Is there some specific constraint regarding vertical and geodetic datums within a compound Coordinate Reference System (CRS)? E.g. if the ellipsoid model should be the same or not, or if the vertical ...
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3answers
128 views
Which CRS to use for Google Maps?
I am trying to map a Shapefile (download) onto a Google Map using the Javascript API. The Shapefile describes the boundaries of NYC School Districts.
The file's projection was Lambert Conformal ...
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55 views
“Request contains a format not offered by the server.” Error when using CRS transformation with WMS in QGIS
When I try to load a WMS layer which has a WSG84 as a default projection and use a CRS transformation on it, it gives this error message:
Request contains a format not offered by the server.
The WMS ...
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1answer
22 views
Deleting QGIS CRS
I've created a new CRS on QGIS but I assigned a wrong name mistakenly to CRS's name.
Now I have the CRS defined but the name of the CRS is wrong, or not easily identifiable.
I was wondering if ...
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60 views
Getting: org.opengis.referencing.NoSuchIdentifierException: No transform for classification “Transverse Mercator Zoned Grid System” with geotools
Using geotools I've been trying to create a referenced envelope after converting/reprojecting from WGS 84 to UTM with specific zones and it seems that either I need to do something with authority ...
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2answers
80 views
Which function for creating a POINT in PostGIS?
When defining a Point in PostGIS, when do you decide to use which of the following?
ST_SetSRID(ST_MakePoint(lon,lat),4326)
ST_SetSRID(ST_Point(long,lat),4326)
ST_SetSRID(ST_GeomFromText('POINT(lon ...
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58 views
What is displayed when I am using a geographic CRS for my project
I understand that each geographical dataset has a CRS, and that in order to overlay them, you need to either make sure that all datasets use the same CRS, or re-project some of them (or use on-the-fly ...
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1answer
65 views
What does 'projected bounds' and 'WGS84 bounds' mean in the definition of a CRS (on spatialreference.org)?
The site http://spatialreference.org gives 'Projected Bounds' and 'WGS84 Bounds' for each Coordinate System. What does these 'bounds' mean? e.g. for ETRS89 / UTM zone 32 N this is given:
I know what ...
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2answers
76 views
How can I find an appropriate coordinate reference system?
I have a worldmap and need to present different countries (e.g. Japan and France) in different extracts in QGIS. Thus I need to find out the best way to decide for an appropriate CRS for the ...
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44 views
How to get CRS of a raster layer in pyqgis?
I have this problem accessing to the coordinate reference system(crs) of a raster layer map.
I wonder if such thing is possible?
I have used this xml from GDAL open map service to load in a raster ...
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1answer
70 views
Why does QGIS 1.8.0 crash when I try to set up CRS on Win XP?
I have a problem with my qgis 1.8.0. When I click on any button that set CRS or try to set the coordinates on the fly, qgis crash. I try to uninstall the program and re-install it again using ...
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0answers
53 views
Shapefiles with EPSG 31467 and 3044 don't fit together [closed]
I have a problem with some shapefiles I want to fit in my exisiting project. My project layers use as CRS EPSG 3044. They do fit together with OpenLayers GE (EPSG 3857). Now I wanted to add some new ...
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1answer
67 views
MMQGIS: How to make grid layer in meters not degrees?
I've read several of the posts on here pertaining to MMQGIS Create Grid Layer option, but I have not found information on how to make the grid based on meters veres degrees. I know how to manipulate ...
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1answer
53 views
Which BC Albers should I use and is there any difference?
I was about to calculate the area of some polygons and before I did I did some research. I found that the area of the polygon will be represented in the units of the projection used. So I did some ...
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2answers
133 views
CRS in QGIS and ARC don't line up (Malaysia RSO Projection)
I am using QGIS 1.9.0 on Linux Mint; and I am new to (Q)GIS
I have three layers (2xshapefiles, 1xopenlayer[Bing Maps]) that I am trying to line up located in peninsular Malaysia.
Shapefile_1 is a ...
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1answer
55 views
Shapefile CRS damaged. How to bring it back?
I have two shapefiles with same location and extends (EPSG 4326). But one of the shapefiles CRS seems to be damaged after doing a lot wrong with reprojection... its not shown on the same position as ...
