The process of translating a map or spatial data from one geographic projection to another

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2answers
788 views

ESRI State Plane Coordinates as EPSG

I am working with some State Plane projections from Colorado. I have looked them up on spatialreference.org and they are the following: ESRI:102254: NAD 1983 HARN StatePlane Colorado Central FIPS ...
0
votes
1answer
256 views

How to reproject WSF layer created from GeoJSON?

I have a WFS layer: myVecLayer_disp= new OpenLayers.Layer.Vector("Редактируемый участок",{projection: new OpenLayers.Projection("EPSG:900913")}); And i have feature store: var protocol=new ...
2
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0answers
1k views

Projecting point in Leaflet from EPSG 900913 (same as 3857) to EPSG 2232 with proj4js returning unexpected results

I have a leaflet map from which I want to be able to query an api that accepts x y values in EPSG 2232 as inputs. Leaflet doesn't handle point transformations like Open Layers does so I am trying to ...
0
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1answer
517 views

Why are layers not overlapping to each other inspite of having same CRS? [closed]

I am new to QGIS and working with QGIS 1.7.3 version, I have my all layers in WGS 84 CRS but even though they are not overlapping to each other, What should I do ?
3
votes
1answer
2k views

Export to new projection in QGIS 1.8

I would like to use QGIS to convert a CSV file from UTM to lat/long. I imported the CSV file with the "Add Delimited Text Layer" plugin. This works fine, the data looks like it is projected properly ...
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1answer
475 views

PROJ.4 custom projection that is Transverse Mercator with Affine post-process

I am trying to define some of my local TMAF grids in PROJ.4 so I can reproject points between the local grid and MGA95 and/or WGS84. For these grids I have the MapInfo CoordSys clause which defines a ...
1
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0answers
179 views

Converting altitude in feet to pixels on a mercator map image

I know the question might seem farfetched given that the map is 2d. But I essentially want to project items-aircraft-above the map and I would like their altitude to be vaguely 'realistic' in terms of ...
2
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2answers
2k views

Javascript library for converting MGRS to Lat/Lng

Is there a JS library that converts MGRS to LL? I have found one that converts Lat/Lng to MGRS, but nothing that converts MGRS to Lat/Lng. Someone asked this question in the past, but the answer was ...
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1answer
933 views

How to reproject layers (using GeoServer and OpenLayers) in order to overlay on the google maps [duplicate]

Possible Duplicate: Openlayers and Geoserver: OSM/Google Maps and WMS Overlay I am writing a code using OpenLayers. In this code, I want to display different layers in different zoom levels. ...
2
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1answer
2k views

Openlayers Transform not transforming a point from EPSG 27700 to EPSG 4326

I am trying to add Google street view functionality to a Openlayers Map. I have started by using 3 divs to hold the Openlayers Map (which uses a local tilecached base map), a google api map and ...
0
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2answers
363 views

Mercator projection image data

I'm trying to create a map which I can place points on within my application I found some mecator jpg images but in order to accurately place points I need to convert the lat/long to pixels so that ...
1
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1answer
235 views

Raster on-the-fly projection in ArcGIS has different resolutions

I have a map document authored in ArcMap. The spatial reference for each of the raster layers is Alaska State Plane. If I set the Data Frame projection to Web Mercator (Auxiliary Sphere), then my ...
2
votes
2answers
1k views

How to re-project the EASE (Equal Area Scalable Earth) grid with a ~25 km cylindrical projection to WGS84 0.25 degree?

I have nc files. from the metadata ,the projection is cylindrical and the resolution is 25 km: indrical NC_GLOBAL#ease_resolution=25 NC_GLOBAL#history=...
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2answers
2k views

How to convert a Shapefile from bessel1841 to WGS84?

I would like to convert a shape file which has +ellps=bessel to +ellps=WGS. In my understanding, even QGIS1.8.0, it is impossible. Let me know the free software which is able to convert shape file ...
6
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1answer
871 views

Coordinate system in aerial imagery

I am calculating WGS84 coordinates of points in an aerial image, given the WGS84 coordinates of the center of the image and the ground distance width and height (calculated from altitude and lens ...
10
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1answer
2k views

How can I see the coordinate transformation parameters in QGIS?

How can I see (and edit if possible) the transformation method and parameters used by QGIS for "on-the-fly" transformation, and then for saving data in another CRS? Like in ArcGIS? Here is the ...
2
votes
1answer
797 views

QGIS 1.8.0 - Define shapefile as UTM 15 NAD83 Feet

I have a shapefile which the .prj file says it is PROJCS["NAD_1983_UTM_Zone_15N",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM[...
2
votes
2answers
2k views

KML from EPSG:4326 to EPSG:900913

im trying to create KML files manually (XML format) by extracting data from a postGIS database with "geography" values in a column. But i belive i need to transform the projection of each row in the ...
1
vote
1answer
247 views

Can I use GeoWebCache with GeoServer Layers which have different native and declared SRS?

We are using GeoServer to serve raster tiles with a native SRS of 27700, but are forcing use of a declared SRS of 900913. When I try to seed these tiles using GeoWebCache through the GeoServer web ...
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2answers
196 views

How can I find an OSGB six-digit code's bounding box?

How can I convert Ordnance Survey six-digit codes to the latlng bounding box of the related 1km grid square? For example, NH0325: according to Wikipedia this means a 1km square whose south-west ...
5
votes
2answers
1k views

Why do I get “Failed to transform” when reprojecting from WGS84 to Google Mercator?

I am attempting to re-project a vector shapefile from Natural Earth, following a qgis tutorial. Another user reported this error, but a solution has not yet been reported. Given this post, and the ...
4
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3answers
803 views

Why is MapServer adding horizontal artifacts when projecting EPSG:4326 data to EPSG:3857?

We're running MapServer with a map that has just one layer, political boundaries from a SHP file. This layer is using a basic EPSG:4326 projection, and the map itself is using EPSG:3857. The ...
3
votes
2answers
1k views

Why does On-the-fly reprojection not line up Google layers in UTM?

My UTM shapefile lines up with Google layers if the project CRS is set to WGS84 mercator projection (including default 3857 and Google). But if I set the project CRS to UTM Zone11, they are slightly ...
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2answers
2k views

How can I improve my Georeferencing results?

Background This is my second question related to georeferencing naked raster maps in order to re-visualize them on different coordinate systems and in conjunction with other data layers. The previous ...
2
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1answer
1k views

Reprojection from WGS to Slovenian Gauss Kruger in QGIS

I have gpx file (track) in WGS84 (EPSG: 4326) coordinate system from Garmin GPSMAP 62 which is right projected in BaseCamp and MapSource. When I save track as *.GPX and import it to QGIS and use ...
2
votes
1answer
1k views

QGIS: On the fly projection from WGS84, 19 N, to Web Mercator. Do I need to define a new CRS with transformation parameters?

Workin in QGIS, I have a shapefile called "protected areas" of Dominican Republic, that was digitized from topomaps 50k. Shapefile is projected to WGS84, 19N zone. My problem is that when I load ...
2
votes
2answers
1k views

What can go wrong in UTM to WGS1984 conversion (shifted data)

I try to convert .shp files to OSM data with shp2osm and ogr2osm but the output data is shifted. Semi-Cross-Posting Warning: I have already asked a questions on the OSM help site, but this questions ...
5
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2answers
2k views

How to convert NAD 27 to WebMercator in using the ESRI Silverlight API? (C#)

I am working with the ESRI Silverlight API. I found THIS post in the ESRI forums and THIS OTHER which show how to convert between WGS84 geographic coordinates and WebMercator coordinates. I want to do ...
3
votes
1answer
303 views

Bug in gdalwarp's simple nearest neighbor? Or more likely I need some help

I'm trying to understand how to use the GDAL utilities a little better. I think I've defined something incorrectly or I've found a bug in gdalwarp. My bet is that I've defined something incorrectly, ...
3
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2answers
1k views

What is the SRS code for Lambert Conformal Conic projection and GCS Everest Definition 1962?

I have a shapefile with Geographic Coordinate System is "GCS_Everest Definition 1962" and the Projected Coordinate System is "Lambert_Conformal_Conic". I want to add this shapefile in Geoserver. But I ...
1
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1answer
1k views

Geoserver WFS GetFeature returns no features when reprojecting PostGIS layer

I may be misunderstanding the GeoServer documents, but when accessing a GeoServer 2.2 WFS 1.1 layer, should I be able to reproject to an arbitrary SRS via the SRSNAME parameter? I'm generating a ...
2
votes
1answer
27 views

Crashing trying to warp map files

I have been trying to warp ECW and Ozfx3 map formats to GeoTiff format. I have navigated to Raster>Projections>Warp(reproject) I have then selected the file to warp the output that I want and ...
4
votes
1answer
437 views

NAD83 and NAD83 State Plane

I'm struggling with a projection question. I have some data in California State Plane and am trying to align a NED with NAD83. I thought these would just natively align, but they don't seem to ...
2
votes
1answer
716 views

Requesting map tiles from a wms server in epsg:900913 fails

I'm trying to figure out how to query a WMS server by using latitude/longitude coordinates. The reason is I'm trying to create an iPhone application and overlay custom tiles with data from the WMS ...
2
votes
1answer
366 views

How to convert NAV4 coordinate system to WGS84?

I would like to know whether it is possible to convert the coordinates given in a NAV4 coordinates system into WGS84. I could not find out what NAV4 is and if it is actually a standardized CRS. Here ...
25
votes
2answers
17k views

What is the difference between EPSG:900913 and EPSG:3857?

I'm using the QGIS google layers plugin to digitize a parcel as a shapefile. Later I want to import it to PostGIS. I know that google maps use a special 'google mercator' projection. What is the ...
5
votes
1answer
1k views

Raster incorrectly reprojected to OSGB(27700)

Ubuntu 12.04, QGIS 1.8.0, GDAL/OGR 1.7.3, GEOS 3.2.2 Open a Spatialite db with OS Mastermap poly layer (EPSG:27700); Add OpenLayers Plugin (1.0) from QGIS offical repository; Add a Google Satellite ...
1
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0answers
165 views

How to reproject aqua modis images / ocean color?

I am working with aqua modis, ocean color, L2 - SST image but in order to do I must reproject it. I use the gdal_translate to convert the format of the image but reprojection is becoming very ...
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0answers
86 views

resampling errors

I have to reproject my images, but it contains some resampling errors. Any one has any idea on significance of resampling error. Are they neglectable? Is there any good documentation to refer to? I'll ...
25
votes
3answers
10k views

How to reproject all geometries in a PostGIS table?

I created a spatial table with SRID:4326. Now I want to change total projection to SRID:32644 into a new table. The old table should remain unchanged.
0
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0answers
185 views

Why the georeferencing in UTM does not work with the QGIS georeferencer?

First time here, sorry if this looks simple. I use QGIS on Windows 7. I georeferenced a toposheet with geographic references to UTM. When I superimpose a UTM raster, the toposheet is near the origin ...
2
votes
0answers
105 views

Proj4s.js Library Transformation Accuracy Documentation

I am using proj4s.js for transforming between coordinate systems for a GIS web application. Is there any documentation out there on transformations accuracy provided by the library?
9
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1answer
6k views

How to reproject a raster file in QGIS with datum transformation?

I want to reproject a tiff raster file from projection A (ETRS89/UTM Zone 32) to projection B (DHDN/Gauss-Kruger zone 2). The two projections have a different datum so I have to use a datum ...
5
votes
1answer
2k views

How to reproject a raster in QGIS?

I am a history teacher and I like to make my own maps (I can never find exactly what I want). I am using QGIS 1.8 and Natural Earth data. I want to reproject their cross-blended hypso rasters into ...
2
votes
1answer
464 views

Why is my PostGIS transformation not working?

I am using a PostGIS query to find the intersection of two streets, and then transform the results into lat/lon. The street database's current SRID is 6856, a projection I added to PostGIS myself; and ...
1
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1answer
174 views

Transforming x/y co-ordinates of 'custom' map to 'real' long/lat co-ordinates?

I have in front of me a 'custom' map of an area I like to visit. It's just a representation of the area, so there's no real connection between the points on the 'custom' map (a) and how they would ...
2
votes
1answer
43 views

Change Which FeatureClass a RelationshipClass Points at

When you use ArcGIS' Project tool it creates a new featureclass. This is awesome, unless the featureclass you projected had been related to twenty-some tables. All of those relationships still point ...
2
votes
1answer
765 views

Help converting projection/coordinates to Google Earth

I'm trying to program a GPS style tracker for a simulation game but I'm having a hard time figuring out how to transform the game's coordinates into Google Earth's. The game's world is flat and has ...
2
votes
1answer
410 views

Coordinate systems conversion

I have the following task. This is my sample data. WGS84 datum (longitude/latitude): -123.75 36.59788913307022 -118.125 40.97989806962013 Spherical Mercator (meters): -13775786.985667605 4383204....
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0answers
823 views

How to reproject a raster in QGIS? [closed]

I wanted to reproject raster file from UTM to decimal degree in QGIS version 1.7.1 or 1.8.0.. I could reproject one raster file before in QGIS Version 1.8.0. I have tried again, but now we cannot ...