I have implemented a map using Leaflet and tiles from a WMS-service. They offer a list of projections, where of one is usable in standard Leaflet EPSG:4326. However, the map looks a bit distorted,...

I'm trying to convert some Apple mapping code to Java. I have most of it converted correctly except for a few calls to MKMetersPerMapPointAtLatitude I have a very close solution... but it's not ex...

I have implemented CPU code that copies a projected texture to a larger texture on a 3d object, 'decal baking' if you will, but now I need to implement it on the GPU. To do this I hope to use compu...

this question is a follow-up of my prior SO question and is related to this question. i'm just trying to white-fill an area 10% bigger than a simple polygon with ggplot2. maybe i'm grouping things...

I'm just trying to white-fill the area outside of a simple polygon. For some reason, it's screwing up by drawing a weird stake through the center like it thinks its a vampire slayer or something. ...

In the following script, I read in a number of pairs of points and draw lines on a map. I am using ggmap to pull in a map from google to plot this lines over: source('./library/latlong2state.R') ...

Im using an Leafletjs for an home project(This is have it looks, right now. But i can't find have to setup the projection, i have found it for OpenLayers, which looks like this: // Openlayers set...

I have a set of 2d grid points (x,y) that I want to map/project onto a sphere as 3d points (x,y,z). I realize there will be some warping towards the poles as abs(y) increases but my grid patch wil...

I am trying to map an irregularly gridded dataset (raw satellite data) with associated latitudes and longitudes to a regularly gridded set of latitudes and longitudes given by basemap.makegrid(). I...

In my GIS application the data are sometimes stored in "Google Mercator" (in meters), sometimes in WGS84 LatLon. I'd like a reliable library to convert this data easily and in a "scientific" way, r...

How does one prevent country polygons from being cut off under different projections? In the following example, I would like to do a stereographic projection map of Antarctica including latitudes...

I am trying to plot celestial object on the sky (basically with coordinates equivalent to latitude/longitude). I successfully plotted all my points using the "aitoff" projection of the coord_map fu...

I'm looking for an explanation on why there are 2 different mercator formulas discussed on these sites. I understand this to be the correct mercator projection algorithm: http://en.wikipedia.org/...

I'm using OpenLayers with an ordinary mercator map and I'm trying to sample a bounding box by finding a grid of points in latlong. The bbox is expressed in latlon, e.g. 48.1388,-15.3616,55.2057,-3...

I have a GPS-coordinate in WGS84 that I would like to transform to a map-projection coordinate in SWEREF99 TM using PROJ.4 in Java or Proj4js in JavaScript. Its hard to find documentation for PROJ...

So I'm writing a Javascript library that takes x,y coordinates and uses them to draw a map of the US. To do this, I need to find the coordinate data necessary to draw each state. This map on Wikipe...