A library for performing conversions between cartographic projections.
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1answer
31 views
Drawing on jpg-map image with proj4 (perl)
From the point of view GIS professionals this question will be sure very primitive, but please keep in mind - i'm totally newbie in this area - and this is my 1st question here.
Have several GPS ...
0
votes
0answers
23 views
How to set GDAL/cs2cs/proj to use NTv2 grid shift file when using EPSG codes?
I am using the GDAL API for Python for a script that takes only EPSG codes for inputs to specify source and target coordinate systems.
While the cs2cs command seems to handle quite well ...
0
votes
2answers
43 views
Leaflet proj4leaflet with multiple projections
I am looking at having both EPSG4326 tiles and EPSG3857(cloudmade) tiles on a single map (but separate layers). I have been looking at the proj4leaflet plugin, and it "appears" to me that this might ...
3
votes
1answer
58 views
Location for floorplan
Is there an application / service where I can put my floorplan of a building en 'position' it on the right place on the earth? (The buildings location).
I found TileMill an application where I can ...
1
vote
1answer
53 views
PROJ4 C++ API: Amersfoort RD New to WGS84
I try to convert between dutch RD New (EPSG:28992) and WGS84 (EPSG:4326) via PROJ4 C++ API.
On the console this works with:
cs2cs +proj=sterea +lat_0=52.15616055555555 +lon_0=5.38763888888889 ...
4
votes
1answer
70 views
Openlayers/Proj4js not transforming coordinates the first time
Something seems to be going wrong with my transformations. Before I added proj4js, transforming a coordinate went fine:
new OpenLayers.LonLat(-1.0, 52.0).transform(new ...
0
votes
3answers
265 views
How can I get the proj4 string or EPSG code from a shapefile .prj file?
I have to work with a shapefile defined in an unusual projection, which my GIS software does not know about. How can I get the proj4 definition or the EPSG code for the projection?
1
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2answers
56 views
Lambert projection with one or two standard parallels and proj4
I'm sure there is a gap in my understanding, but I haven't been able to identify where it is, nor how to fill it. My issue is this:
I'm transforming lon lat coordinates into a lambert conformal ...
0
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1answer
59 views
constant deviation projecting lat lon to itm(israel tranverse mercator
i use two different ways to project lat lon data taken from google earth to ITM (Israel Transverse Mercator) and export the data to arcmap same ways i try to unproject ITM data and export the data to ...
1
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0answers
44 views
How can I fix badly specified geographic coordinate system with units in arc-seconds?
Check out this depth-to-rock soil data. It is linked from here. The spatial reference system is a latlon, but the units are arcseconds. I could not reason out how to override the SRS even after ...
2
votes
0answers
57 views
Proj4 inconsistent longitude after projection
All coordinates expressed in this question are (longitude, latitude), the default for proj4. London is at (-0.1460838, 51.5170986), and San Francisco is at (-122.419302, 37.775549). According to the ...
0
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0answers
145 views
Figuring out Latitude and Longitude from XY Image [closed]
I'm having difficulty calculating the latitude and longitude values of an image that I am hosting inside of a div tag on my webpage. I can easily figure out the x,y (pixel) coordinates of the image ...
5
votes
1answer
162 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
1answer
58 views
Having trouble finding out what coordinate system a map is using, and how to convert it
I'm using Small Area shapefiles in Ireland from the Central Statistics Office (CSO) website. The link to these is here http://census.cso.ie/censusasp/saps/boundaries/ED_SA%20Disclaimer1.htm (Look for ...
0
votes
1answer
87 views
Geostationary satellite projection to be introduced in GDAL
I'm working on raster files and their spatial reference system is:
PROJCS["Geostationary_Satellite",
GEOGCS["GCS_Unknown datum based upon the custom ellipsoid",
DATUM["D_Not specified ...
0
votes
0answers
56 views
converting instructions to proj4 string for WRF-NMM E-grid
I'm looking for proj4 string for the WRF-NMM weather model projection.
This gris is called Arakama rotated E-Grid.
I spent many time looking on the internet. Here's the only practical thing I found.
...
2
votes
0answers
255 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 ...
1
vote
1answer
118 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 ...
4
votes
1answer
83 views
Problem with custom projection definition in Qgis
I want to define a custom crs valid for Mexico. The context is that older cartography in Mexico is based on the NAD27 datum. I wanted to test the following proj4 string
+proj=longlat +ellps=clrk66 ...
4
votes
1answer
105 views
pyproj, proj4 doesn't return same coordinates after inverse conversion
I'm trying to interpolate between coordinates, as a step in that process I convert latlong to UTM so I can work in metric.
I don't get the expected latlong when converting back, reproduced below:
...
2
votes
1answer
145 views
How do I solve a “No PROJ.4 translation” error with gdal?
I've installed gdal using the brew utility on OS X so the proj and geos dependencies were also installed. I'm now trying to warp a GeoTIFF so that I can import it into Google Earth. I am getting a ...
0
votes
1answer
166 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 ...
1
vote
1answer
93 views
PROJ4 Library error in combination with MapServer 6 and CentOS 6
I have recently compiled MapServer 6.2 on a CentOS 6.3 machine. Since I compiled it --with-proj=/usr, all the PROJ4 related stuff resides in /usr/share/proj.
I've also installed proj4 with yum ...
4
votes
1answer
267 views
use proj4 to specify Robinson projection with R ggmap and ggplot2 packages?
I want to project this map in robinson projection:
library(ggmap)
world <- map_data("world")
ggplot() + geom_path(data = world,
aes(long, lat, group = group))
...
3
votes
2answers
109 views
SRS: geographic or cartesian?
Let's have a list of SRS with proj4 definitions (e.g. spatial_ref_sys table). Is there a way to determine whether given SRS is geographic (lon,lat) or cartesian (x,y)?
1
vote
1answer
38 views
How to fix PJ_healpix.c in PROJ.4?
Michael Speth and i are in the process of fixing the PROJ.4 implementation of the HEALPix map projection (see http://trac.osgeo.org/proj/browser/trunk/proj/src/PJ_healpix.c for the current buggy ...
0
votes
0answers
64 views
How do I determine programmatically what values to add to the proj4js constructor for a CRS or SRS such that I can iteratively render proper overlays
I think this is primarily a GIS based question as far as for example:
var crs = L.CRS.proj4js('EPSG:2154',
'+proj=lcc +lat_1=49 +lat_2=44 +lat_0=46.5 +lon_0=3 +x_0=700000 ...
1
vote
2answers
258 views
Why is Spatialite delivering “Invalid SRID” error message
Qspatialite in QGIS 1.8 (and also Spatialite-gui) delivers an "Invalid SRID" error message when I try to load shapefiles with a SRID value of 3814 (Mississippi Transverse Mercatur). The SRID is ...
3
votes
1answer
225 views
how to add a custom SRID to Spatialite
I'd like to create a spatialite database and load it with shapefiles using the Mississippi Transverse Mercator (MSTM) projection, but it doesn't have an EPSG definition in the spatialite library of ...
1
vote
1answer
100 views
Problem reprojecting KML in EPSG:2039 Map - OpenLayers 2.12 + proj4js
I have KML files (EPSG:4326) and a background map I made using EPSG:2039 projection (mandatory).
When I try reprojecting the KMLs to show in EPSG:2039 I don't succeed and still they don't appear on ...
1
vote
2answers
199 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
180 views
Get the geotransform in Mercator given a pixel size away from the origin
I have a radar image with the following information:
The projection is Mercator (Mercator_1SP in GDAL)
The projection origin is 0º lat 0º lon
At a given geographic coordinates (e.g. lon=10º ...
2
votes
0answers
63 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?
10
votes
2answers
254 views
How to reproject raster from 0 360 to -180 180 with cutting 180 meridian
I have a geotiff raster image that has a coordinate system with longtitudes from 0 to 360.
The horizontal center of the image is 180 longtitude. See image below:
I want to transform it to EPSG:4326 ...
2
votes
1answer
573 views
How to setup leaflet map to display a WMS layer in ESRI:102012 projection?
I have a WMS server that serves layers in ESRI:102012 projection.
http://spatialreference.org/ref/esri/102012/
It accepts GetMap requests with srs=EPSG:102012 parameter.
My goal is to display a map ...
1
vote
1answer
635 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 ...
1
vote
2answers
635 views
How to convert Lat/Long to UTM using Proj(4j) similar to JScience UTM.latLongToUTM?
I'd like to use Proj(4j) to convert between UTM and Lat/Long coordinates.
I used to use JScience for UTM <-> LatLong conversions like this:
UTM.latLongToUtm(latlong, ReferenceEllipsoid.WGS84);
...
2
votes
3answers
153 views
How would you use change the projection within KML file?
I have created some KML files by converting the projection with both ARC and MapWindow.
I'm looking for ways to automate exporting the data from our application with coordinates in State Plane ...
0
votes
0answers
70 views
Proj4js accuracy compared to Proj4
Is there any lost of accuracy in reprojecting using Proj4js in the browser (compared to using server side Proj4 in Mapserver ) ?
1
vote
0answers
103 views
proj4's omerc projection (cs2cs) broken?
When I project longitude -60, latitude 0 to mercator, I get the
expected answer:
> echo "-60 0" | cs2cs +proj=lonlat +to +proj=merc
-6679169.45 0.00 0.00
However, when I project it to ...
3
votes
0answers
50 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, ...
3
votes
1answer
121 views
proj4 cookbook?
Is there a proj4 "cookbook"? I discovered proj4 from @MerseyViking
excellent answer to: Create Mercator map with arbitrary center/orientation? but
most of the documentation appears to be fairly high ...
3
votes
3answers
709 views
How to define ITRF 92 and ITRF 2008 using Proj4 parameters in QGIS?
I know how to define a CRS, but this particular one is giving me a headache. I was unable to find the EPSG code at spatial reference.
The main reason for asking this is that raster and vector data ...
1
vote
2answers
210 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
vote
1answer
114 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 ...
0
votes
1answer
952 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 ...
1
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0answers
136 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
votes
2answers
133 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 ...
1
vote
1answer
100 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 ...
1
vote
1answer
459 views
Generating Map Tiles for MGRS Grid Graticule
I'm possibly a bit out of my league here, but ready to get my hands dirty. I want to generate map tiles for a MGRS grid graticule similar to http://tiles.mapbox.com/mapbox/map/afghanistan-mgrs.
I ...
