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

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5
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3answers
11k views

How to convert MGRS to Lat/Long or UTM?

Can anyone please guide me on converting Military Grid Reference System (MGRS) to lat/long or UTM.
4
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2answers
384 views

How to register shapefiles to an image?

I'm generating images from various sources and the projections are not necessarily known ahead of time. The images are subject to interpolation and other alterations while being rendered, but I can ...
3
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1answer
310 views

Holes between imagery tiles projected using gdalwarp

I am having the following issue when reprojecting imagery tiles using gdalwarp. These are 4096x4096 imagery tiles, which I'm gdalwarp'ing from WGS84 to a State Plane projection. When reprojected, ...
3
votes
3answers
33k views

How to convert x y coordinates to longitude latitude using QuantumGIS?

I'm working with this downloadable shapefile that has X Y coordinates. They are akin to '3672187.92698000, 534175.72095400'. I would like to convert them to longitude latitude so they are more like '-...
3
votes
2answers
4k views

Converting NZMG (or NZTM) to latitude / longitude for use with R map library

I am a statistician with no background in GIS so apologies for the newbie question. We routinely use R for a range of statistical and graphic analysis and are interested in using its map library to ...
3
votes
1answer
3k views

How to write a script that re-projects vector datasets in a folder?

This is probably a novice question, but I am a novice with python. I am trying to write a script that re-projects vector datasets in a folder. However there are rules in which to do this. They are: ...
9
votes
6answers
9k views

ArcGIS/ArcPy Python, how to get latitude and longitude of a projected point?

I have a point feature in a feature class that is being accessed by ArcPy. The point is projected but I need to find an efficient means to get the unprojected latitude and longitude for this point. ...
6
votes
2answers
8k views

Basic proj4 conversion UTM grid -> longlat and back

I'm a GIS novice, and am struggling to understand how to drive proj4 to accomplish what seems like a simple thing. I've googled for a couple of days, but everything I find seems to presuppose quite ...
5
votes
1answer
754 views

Custom Geographic Transformation on QGIS

Is there a way to create a custom geographic transformation with specifics parameters in QGIS like in ArcGIS? Okay, I want to tranform SAD69 system into WGS84. Well, I'm in doubt because in ArcGIS ...
5
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2answers
2k views

Does anyone know the proj4 Coordinte Reference System command line for Rectangular Polyconic Gores?

I am a GIS beginner using QGIS 1.8.0 I am trying to transform a world map from the standard WGS84 Coordinate Projection System to a set of rectangular polyconic gores, with a gore count of 12. ...
5
votes
4answers
731 views

Given long, lat, x and y, how do I find the projection?

I am using an app called farsite that outputs shapefiles that show how forest fires will grow. I am getting output in coordinates as X and Y values rather than (lon,lat) and am looking for a ...
5
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1answer
2k views

MGRS in OpenLayers

I am trying to view the Military Grid Reference System coordinates in Openlayers through the MousePosition control. Is there an easy way to accomplish this just through Javascript? I am looking at the ...
4
votes
1answer
297 views

Difference between gdalwarp and projectRaster

I am trying to project a Raster. In R there is the projectRaster() function to to this (below a fully reproducibly example) : # example Raster require(raster) r <- raster(xmn=-110, xmx=-90, ymn=40,...
4
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0answers
248 views

What projection system is used in China which is aligned with WGS84 [closed]

I have some GPS tracks in Beijing. I want to project it and convert the lat long degree values in meters for calculation in euclidian space. I was wondering what is the most suitable coordinate and ...
4
votes
4answers
14k views

Getting shapefile in right projection using ArcGIS Desktop? [duplicate]

I have an older map that I didn't create. I'm just trying to get everything to line up on it, and having a hard time. The data frame is in NAD_1927_UTM_Zone_12N, as are the point shapefiles (derived ...
3
votes
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 ...
3
votes
1answer
5k views

Convert a shapefile with northing/easting to ASCII raster with latitude/longitude

Linked below is a polygon shapefile whose projection is NAD83 and whose values are LU/LC codes. Coordinates are meters of northing and easting. I would like to convert it to an ASCII raster with ...
3
votes
3answers
2k views

Mercator: scale factor is changed along the meridians as a function of latitude?

"In Mercator projection the scale factor is changed along the meridians as a function of latitude" How to calculate the Mercator scale factor as a function of the latitude in decimal degrees ? ...
2
votes
3answers
4k views

How to convert projection

I got sample shape files with the following *prj file content: *PROJCS["RGF93_Lambert_93",GEOGCS["GCS_RGF_1993",DATUM["D_RGF_1993",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",...
2
votes
1answer
1k views

How to unproject coordinates on a Google map with Openlayers?

Below is my code and a pic. When I finish making my circle on a Google map with Openlayers, I get the following coordinates but I want coordinates like E.G: bottom: -27.762124575762 left: 25....
2
votes
2answers
236 views

Wrong projection high quality shapefile for the coastline of Helsinki region (Finland)

I did some spatial interpolations in R and I need a support for those. Looking for shapefiles online the best I could find was and it looks really horrible, the same area in ggplot looks like . I ...
2
votes
2answers
279 views

Problem with reprojecting raster from MGI 6 to WGS

When I reproject a raster from Mgi 6 to WGS 84 using Warp in Quantum gis it makes mistake ( about 380m). Is there any way to avoid this?
2
votes
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 ...
2
votes
0answers
569 views

How to overlay geographic data from multiple sources?

Being a newbie to GIS, I am trying to create a map using shapefiles and addresses found online, as an exercise. The steps are below: I downloaded a shapefile of Connecticut from the following link (...
2
votes
5answers
3k views

Convert geographic coordinates to UTM zone 29N with Javascript

I have an issue converting lat longs to UTM with the ArcGIS javscript API. Lets say that I have a map, based on the UTM zone 29N, also known as WKID 32629. I have a known set of coordinates from a ...
1
vote
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
vote
1answer
362 views

How to Install GDAL with ECW Support on Windows

What do I download from http://www.gisinternals.com/stable.php for Win7-32 to cut 1:1M map sheets out of Australia.ecw file in GDA94/Geographic and save them as geotiff in WGS84/Geographic? I would ...
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1answer
1k views

Reprojecting from MGRm to WGS84 using open-source tools

I would like to work with some of the Michigan state data (for example, this shapefile of cities ), but it is not in a common projection. However, when I try to reproject the file using ogr2ogr and ...
1
vote
1answer
97 views

Projection system differs

I want to define projection for a Shape file. The projection system is: "NAD_1983_StatePlane_Montana_FIPS_2500" which is referred in Qgis 1.9 as EPSG:102700. The same projection system is not ...
5
votes
3answers
268 views

Transforming file geodatabase feature classes from custom local coordinate system?

Background: Started working for company that is in middle of system-wide IT upgrade including GIS data. Existing in-house data is in a FileGDB, is in an assumed coordinate system and represents 1000 ...
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 ...
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
votes
1answer
765 views

Reprojecting Natural Earth “Admin 0 – Countries” shapefile to Web Mercator

I haven't received a reply posting this same question on the Natural Earth forums, so I figured I'd give it a try here. I’m trying to reproject the 1:10m "Admin 0 – Countries" shapefile into a Web ...
4
votes
2answers
2k views

Cartesian world sized projection WKT/EPSG code?

I am after the EPSG code or Well Known Text (WKT) of a projection that puts the centre of the earth a 0,0,0 and each point is a cartesian XYZ distance from that. My existing data is in WGS84 lat/...
4
votes
2answers
656 views

LSA-SAF data reprojection with GDAL and R

The Land Surface Analysis Satellite Applications Facility (LSA SAF) distributes several products derived from the EUMETSAT satellites data. I am working with R to read and process the data (the file ...
4
votes
2answers
4k views

Reproject GeoJSON in OpenLayers 3

I'm basically trying (and failing) to replicate this in OpenLayers 3. I've set up a fiddle here: http://jsfiddle.net/vu8ecy8v/5/ I'm under the impression that OpenLayers will reproject a GeoJSON ...
4
votes
1answer
4k views

Change vector projection in Openlayers

I have added vector layer to map: vactorTest = new OpenLayers.Layer.Vector("Editable Features", { strategies: [new OpenLayers.Strategy.BBOX(), saveStrategy], projection: new OpenLayers.Projection(...
3
votes
1answer
773 views

Ordnance Survey data to WGS-84

Recently I have reprojected Ordnance Survey data from British National Grid (ORD SURV GB) to WGS-84 using ArcGIS 9.2. After re-projecting I have found some shift in the data. Can any body guide me ...
3
votes
3answers
2k views

Is there any way to reproject multiple layers in QGIS?

I'd like to be able to consolidate not only the layers of a QGIS project (using QConsolidate) but also the projections used by each layer. On-the-fly projection reduces performance in QGIS, and this ...
3
votes
3answers
1k views

Coordinate System (Malaysia RSO Projection) not lining up in QGIS and ArcGIS for Desktop?

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 ...
3
votes
1answer
90 views

Rotating ~90° using Two-Point Equidistant projection with Proj4

I'm trying to rotate a tif raster in R using Proj4's Two-Point Equidistant projection - I think the only way to rotate spatial geometries to custom angles. But I'm finding the operation gets very ...
3
votes
4answers
4k views

WFS getfeature request with diffent SRS

I'm having problems with a WFS getFeature request. I'm using openlayers with an OSM map as baselayers which use the google projection. Overlaying the layer with WMS works perfect. When I do a request ...
3
votes
1answer
1k views

Coordinate conversion (EPSG:3857 to EPSG:4326) using OpenGIS/JTS too slow

I am using the Java based libraries of OpenGIS and JTS to convert coordinates from EPSG:3857 to EPSG:4326 to proceed to compute the distance using the Haversine formula. The distance features in a ...
3
votes
0answers
1k views

Converting projected coordinates to google maps pixels

I have a single polygon in a local projection system. I would like to convert that polygon into an image that can be used as an overlay on google maps. I understand that it may be better to use ...
2
votes
1answer
330 views

Why are layers not lining up with others with the same CRS? [closed]

I am creating a project on the UK and have downloaded various shapefiles. When I add a vector layer they are coming up as if they are not lining up. Some layers are nicely on top of each other with ...
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
3answers
2k views

Coordinate transformation/reprojection using DotSpatial

need some help. The following piece og code worked with an older version of DotSpatial. public static Geometry Project_EPSG25832_To_EPSG3857(byte[] wkb, int SRID) { NetTopologySuite.IO....
2
votes
1answer
2k views

GeoTools and PostGIS with ESPG:3857

I'm trying to use both PostGIS and GeoTools with the same ESPG:3857 projection, however, it looks like the projections in PostGIS and GeoTools differ. This is what I have in PostGIS: PROJCS["WGS 84 ...
2
votes
2answers
1k views

Conversion of Latitude/Longitude to different map projection

I have two m*n matrices coming from a WRF-ARW simulation: one exclusively with longitude values and one with only latitude values. For both matrices I know the originatin projection (lambert conic ...
2
votes
1answer
637 views

Pyproj: converting WGS84 to Robinson

I have a WGS84 coordinate pair (37.7749295, -122.4194155). I have an image that is a Robinson Map Projection of the world. I'm trying to write a python script to locate my WGS84 coordinate on my ...