Tags » PostGIS

How to name your road

In Motorway or motornay? I coloured UK roads by the first number in their name. To make the nomenclature clearer I have grouped these roads into regions, then coloured the map below. 114 more words

Ordnance Survey

KNN with FLANN and laspy, a starting place

FLANN is Fast Library for Approximate Nearest Neighbors, which is a purportedly wicked fast nearest neighbor library for comparing multi-dimensional points. I only say purportedly, as I haven’t verified, but I assume this to be quite true. 502 more words

FOSS

Drivetime analyses, pgRouting


We’ve got some quick and dirty pgRouting-based code up on github. I say quick and dirty because it directly references the table names in both of the functions. 410 more words

PostGIS

Importing Large Spatial Datasets into PostGIS

Is PostgreSQL/PostGIS suitable for Big Data? This is a question I have been asking myself for a while, and I now have the opportunity to test it with a PostgreSQL instance from Amazon Web Services (AWS); after all, if such a service… 1,015 more words

Databases

Installing Postgres and PostGIS on Centos 6.5

I had some issues with my install from the original instructions on the postGIS site. What follows is a fix that worked for me.

My install was performed with guidance from the… 142 more words

PostgreSQL Database Application

Hi Chuck,

I am researching online mapping services for a class project and found this:

National Wild Fish Health Survey Database.

http://www.fws.gov/wildfishsurvey/database/nwfhs/

It runs on PostgreSQL. 217 more words

Geospatial Data

Plugin-free QGIS TMS tiles via GDAL

Want to load your favorite tiles into QGIS? How about a plugin-free QGIS TMS tiles via GDAL:

http://www.3liz.com/blog/rldhont/index.php?post/2012/07/17/OpenStreetMap-Tiles-in-QGIS

Really awesome… .

Needs but one change: epsg:900913 should be epsg:3857 or QGIS (GDAL?) throws an error. 168 more words

PostGIS