So its been over six months since I made my first tutorial post about PostGIS. I now use PostGIS on a regular basis and thought it would be good to update the tutorial with some meat on how to use PostGIS.
Get some data and import it
Grab populated places points
wget http://edcftp.cr.usgs.gov/pub/data/nationalatlas/citiesx020.tar.gz
Grab US counties map:
wget http://edcftp.cr.usgs.gov/pub/data/nationalatlas/countyp020.tar.gz
Lots more data available in the National Atlas
Continue reading ‘Getting to know PostGIS Part II’
Using libsane and tesseract, you can scan from an ADF (or non ADF) scanner in Ubuntu 7.10 to a PDF and OCR’ed text document with a few easy steps.
First we need to make sure we have the necessary packages installed.
apt-get install tesseract-ocr sane-utils
Continue reading ‘Scanning with sane’s scanimage from an ADF scanner to PDF and OCRed Text’
I am making the plunge to get more informed with how to use PostGIS. It is pretty impressive so far. Here is a quick tutorial which shows you how to get started and loading in a shapefile to play around with some fun SQL querying. I assume a basic understanding of the linux command line and some basic SQL skills.
To get started in ubuntu 7.04 (should work in 7.10 and debian too):
$ sudo apt-get install postgis postgresql-8.1-postgis
Next we’ll start setting up the PostGIS environment.
Continue reading ‘Getting to know PostGIS’
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