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

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1answer
2k views

Mapping x, y pixel coordinates to latitude and longitudes on the WGS84 datum

Apologies in advance for the long question, I am fairly confused at this point and I figure if I show my thought process any flaws early on in the piece can be more easily pointed out. I have a grid ...
0
votes
1answer
144 views

How to reproject an EVF?

I have an .evf file and it is not opening in QGIS. How can we reproject the vector layer (specifically if we want to convert it from lat/lon to UTM projection)?
6
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1answer
2k views

Python script to convert Lat Long to ITM (Irish Transverse Mercator)

I am currently working on a python script that converts Lat Long (WGS84) to ITM. The formulas used are based on a paper published by OSGB (Appendix B): ...
3
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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 ...
2
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1answer
4k views

how to reproject the coordinate system from WGS84 to UTM with ProjNET

I'm new to ProjNET and NetTopologySuite, I get some points with Lon/Lat in WGS84, and the distance between two points is not with the unit of meter, so I want to reproject the coordinate system from ...
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0answers
58 views

How to Convert Long/Lat from Excel into shapefile? [duplicate]

Possible Duplicate: How can I convert an excel file with x, y columns to a shapefile? Possible duplicate, How can I convert an excel file with x, y columns to a shapefile? How do I ...
15
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1answer
14k views

Projecting sp objects in R

I have a number of shapefiles in different CRSs (mostly WGS84 lat/lon) that I'd like to transform into a common projection (likely Albers Equal Area Conic, but I may ask for help on choosing in ...
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0answers
436 views

Getting Latitude & longitude of a Mollweide projection

I am very new to geotools and map-projections and after researching a hole day I still don't know where to start. I have a map with a size of X,Y Pixels and it is in Mollweide projection. How can I ...
2
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4answers
2k views

How do I request an output from a WMS service in a non-standard projection?

I want to use a map service which is available in WMS format. The server is Mapserver, and the spatialreference of the map service is 4326. I wish to use it in a slippy map (web based Javascript ...
4
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3answers
6k views

How to convert the file with projections in meters to Lat-Long in QGIS ar Erdas Imagine?

I have file in Lambert Conformal conic format for the data of Australia, Its coordinates are in meters. I want to convert it to Latitude-Longitude format. Which Projection, Spheroid and Datum I should ...
2
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1answer
257 views

How to reproject arbitrary coordinate system grid to OSGB using FME?

I have a polygon grid of a certain shape that has some data associated with it. Unfortunately its not properly projected, being in what seems to be an arbitrary scale and coordinate system (it was ...
2
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1answer
2k views

Defining datum for Lambert Azimuthal Equal Area and converting to geographic coordinates

I posted this question to a specialised mailing list for spatial data analysis using R here but didn't recieve a response. I am working with shapefiles and rasters in R, and I am unsure if I am ...
5
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1answer
743 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 ...
3
votes
1answer
81 views

How can I specify a spatial reference system which has a north pole different than the standard north pole?

I have a geographic spatial reference system (i.e., latitude and longitude) which has a north pole that is not the usual north pole: it's the magnetic north pole at approximately 70.30 degrees north, ...
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vote
1answer
2k views

GeoToolKit conversion from lat/long to UTM

What is the proper way to convert lat/longs to a UTM coordinate system using the Java geotoolkit API? I have not worked with GIS software before, so maybe what I am trying to do is not directly ...
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1answer
3k views

How to reproject vector datasets in ArcMap?

I want to change one Personal Geo-database projection to another. Kindly give me instructions to re-project vector data.
2
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1answer
3k views

Convert area from square meters to degrees globally

I have a global raster file with 3600x1800 pixels. I don't have any information about the projection used. The raster contains one band with a quantity with the unit "per square meter". How can I ...
3
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0answers
484 views

How do I pass a LatLng Bounds from Leaflet to Mapfish Print?

I successfully fired up a MapFish print server on Elastic Beanstalk, and it prints out the sample spec files fine, but I'm trying to pass bounds from my Leaflet frontend now, and encountering a lot of ...
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2answers
510 views

Geodjango - using projected coordinates with olwidget

I have a database in GeoDjango containing data based on the Australian MGA54 coordinate system (SRID 28354). I have the srid set in the model definintions and when using the standard GeoModelAdmin ...
1
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1answer
237 views

Looking for CRS for NAD 83 UTM Zone 30N

I'm curious as to why the UTM zones are incomplete for NAD 83 in QGIS? I have a WGS84 shapefile that I would like to project to NAD83 UTM Zone 30N but can't find it in the QGIS CRS list. I see how ...
9
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1answer
383 views

Reprojection - Learning the ins and outs

I would like to expand my knowledge coordinate systems, projections and reprojecting data, with a view of writing a reprojection engine. Could you provide me with some resources (books, websites, ...
0
votes
1answer
2k views

Conversion from N,E to Lat/Long And Lat/Long to N,E will always be same? [closed]

I have an excel tool for the conversion of following lat/long: Lat: 23° 11’ 24.67503’’ S Long: 118° 46’ 6.15742’’ E , which gives me following N,E: Northing: 7,434,317.43 Easting: 680,991.69 But I ...
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0answers
213 views

On the usage of Proj4Js->tmerc.js

I am using "proj4js & open layers" for my mapping. I got projection & datum (which is based on "Transverse Mercator") of a local plane and this plane is part of a grid which returns ...
0
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1answer
345 views

reprojection errors with google maps?

Ever since google maps came out, the standard for web maps has been in their “flawed” web Mercator projection. I am trying to figure out why this projection is not good from a geospatial analysis ...
6
votes
1answer
2k views

Reproject script in Python with GDAL

I'm having a lot of trouble with GDAL. Besides just the at times lacking documentation, there seems to be little support in Python. Anyways this is just a batch reproject script that goes thusly: ...
0
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2answers
211 views

How do you pass parameters for Proj4js implementation with OpenLayers

I am using Proj4js along with OpenLayers for the transformation of x,y (projection type is Transverse Mercator) to long, lat. While executing "inverse()" method what I noticed that in tmerc.js some ...
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1answer
149 views

Tool For Generating Formula for Projection

I am using Proj4Js for northing,easting to lat,long transformation. My Datum is "AGD84" and projection is "Transverse Mercator". While doing so I found that if I don't specify "+proj" parameter in ...
2
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1answer
328 views

Proj4 Task not working - Northing Easting to Lat Lng

I usually post in StackOverFlow - if this is the incorrect area to post - I apologise. I have trying to convert a lot of northings / eastings to lat lng I have code below working: In ruby using ...
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1answer
201 views

QGIS - WGS84 to BC Albers reprojection no curved lines, any idea why? How to snap a line to a point?

I am trying to learn a bit about QGIS. So I thought I would drop in some layers of my Province and then recreate some points representing the BC Albers Central Meridian, and the two standard ...
2
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1answer
1k views

Projection ETRS89 (Ellipsoid: GRS80) 6-Degree Zone 33 to UTM33N - WGS84

Hi I'm having trouble to reproject a shape file in Qgis. The projection is supposed to be "ETRS89 (Ellipsoid: GRS80) 6-Degree Zone 33" and I would like to project it to UTM33N - WGS84 (EPSG 32633). ...
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1answer
137 views

Projection - once again

I have a shape file with nature preservation areas (Biosphärenreservate) in Germany. I think the projection must be something like gauss-krüger zone 4 Pulkovo or something like that. When I reproject ...
5
votes
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
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 ...
2
votes
1answer
2k views

ArcGIS javascript api: Convert a map service with projected coords to web mercator

here I see a question about tiled map services. But what about dealing with an arcgis server map service in a projected coordinate system like say 2278, how would I convert this to web mercator so ...
2
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2answers
445 views

How to shift the Map a little bit?

I'm having trouble with two maps, both UTM33N/WGS84. They should be exactly on top of each other but there is a slight shift between them of probably a few hundred meters or so. I Tried to adjust ...
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0answers
421 views

Conversion From Transverse Mercator To Longitude & Lattitude

I have to transform (7-parameters datum transformation) coordinates from northings & eastings to lattitude & longitude. Following are details of source coordinate system(i.e. northings & ...
2
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0answers
1k views

OSGB36 to WGS84 reprojection 'error'

First off, I am a recent convert to QGIS and am greatly impressed with its ease of use and speed compared with the ESRI products with which I am more familiar - my congratulations and thanks to its ...
1
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1answer
643 views

Reprojecting a shape to UTM33

I still have trouble reprojecting shape files :( I would like to reproject it to UTM33N / WGS84 (EPSG 32633) I think the projection of the shape might be Pulkovo 1984/ Gauss-Krüger Zone 4 (EPSG ...
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0answers
498 views

ogr2ogr failed to reproject shapefile error exceeds limits

I cannot get correct transformation from WGS84 to the Hungarian EOV EPSG:23700 (Hungarian Datum 72) using ogr2ogr. I am using ogr2ogr from the fwtools shell. I have a shapefile in GCS WGS84 (epsg ...
2
votes
1answer
456 views

Reprojecting sources with MapProxy yields distortion

I have configured MapProxy to aggregate imagery from a number of Internet sources so that I can dynamically overlay them by adjusting the layers=<x> query that I pass to MapProxy's WMS service. ...
2
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1answer
351 views

Geoserver proxying custom tiles through a WMS

I have a set of tiles that I was given via disk (So no way to recreate them, they are already generated/cached). There is a clear pattern/style to the naming of the tiles (zoomLevel-x-y.gif). The ...
3
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2answers
21k views

How to convert coordinates from meters to decimal degrees?

I have a shape file. The coordinates (Lat/Long) are projected as meter (555000, 155000). But, I want to re-project it to decimal degrees(51.523666, -0.07467). How can I do it with ArcMap or Quantum ...
2
votes
1answer
160 views

Any reason NOT to convert to a single projection when loading GIS data?

I have been given the task of: Loading a list of properties with lat/long coordinates into a SQL Server 2008 database. Loading points and areas (polygons) of interest from a variety of shapefiles ...
2
votes
1answer
328 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
223 views

World map picture to globe

i have 26 pictures of the globe and i want to bound them. How can i proceed to abtain a flatworld map? it looks circa like this but in 26 pieces. map Can somebody help me?
2
votes
1answer
257 views

Converting 2D shapefile to Equal Area Projection?

I have thousands of shapefiles with coordinates in lat/long (-180 to +180 x, -90 to +90 y), that contain polygons of which I wish to calculate the area. I'm using the Python GEOS/OGR/GDAL API. If I ...
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0answers
495 views

How do I use Proj4js or other technique to make custom map projections with google.maps.Projection?

I'm using Google's Projection class to try to convert my map projection from the default spherical mercator to something like Lambert Conformal Conic. I was previously adapting the code from this ...
2
votes
2answers
618 views

How to convert Garmin Waypoints to Google Mercator?

I have georef some topocards with QGIS and the Google Hybrid Layer. So, this cards are connected with the Google Mercator System. Now I have some waypoints taken with Garmin GPSmap62 (in WGS84). ...
2
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2answers
9k views

How to create custom coordinate system in ArcGIS Desktop?

I have a series of control points with xy coordinates in both NAD83 UTM and in a local grid. How can I go about creating a new projection file in ArcGIS 10 for the local grid?
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2answers
1k views

How to project TIGER & WGS84 to Spherical Mercator?

So I've been banging my head on this for about a week now. I'm using QGIS on a Mac. I have various shapefiles in WGS84 and Census TIGER NAD83 (EPSG:4269) and I would like to give them the same ...