ogr

Given a shapefile : Natural_earth/ ne_10m_admin_0_sovereignty.zip Given we want to reproject it for a D3js data viz, we could reproject at different levels. 1. Get a reprojected shapefile ( 1 ), using ogr2ogr : ogr2ogr -f 'ESRI Shapefile' -t_srs 'EPSG:...' output.shp input.shp OR 2. get a reprojected topojson ( 2 ), using (npm) topojson.js : topojson \ -o output.topo.json --projection 'd3.geo.albersUsa()' \ -q 1e5 \ -s 1 \ -- input.shp OR 3. get a reprojected D3js data / SVG ( 1 ), D3js code including: var path = d3.geo.path() .projection(d3.geo.albersUsa()) // unsure of this syntaxe,

I'm building small report using R & knitr, sending the output to pdf. I'm using several shape files in my analysis and whenever I use readOGR function of rgdal package I get information on what is being read, for instance: OGR data source with driver: ESRI Shapefile Source: "__PATH_HERE__", layer: "__NAME__OF__LAYER__HERE__" with 148 features and 5 fields Feature type: wkbPolygon with 2 dimensions Normally, it's useful thing to have.. but unfortunately it also prints out in my pdf output. I tried setting knitr's chunk options to echo=FALSE, message=FALSE but unfortunately it did't help. Any

Here is the problem: GDAL is a fantastic open source library designed to manage complex GIS data, both raster as well as vector. It is fully compiled for the Mac OS (courtesy of William Kyngesburye) and other platforms but not for iOS. Browsing the net you can find bits and pieces of (relatively old) information on the topic of creating an iOS library, starting with the famous script from pseudogreen which was written over 3 years ago. There are also bits and pieces on stack-overflow such as GDAL / OGR on the iPhone which provide additional information. This article is meant to cover all the