Archive for the ‘ArcGIS 9.2’ Category

State-based Spatial References – Projection Files

Sunday, November 11th, 2012

This past week, I received an AutoCAD drawing that did not have a customary state plane coordinate system associated with it. So, I spent some time plugging in different projection files until I figured out what the projection was of the drawing.

After going through that hassle, I decided to create a set of webpages to simplify that task for me, for the next time I have to go through that effort. I am making those webpages available on my website for others to use.

The link to that is:

Just click on the state in the map, that you are looking for projection data for. Enjoy!

Florida Sinkholes Mapping

Saturday, May 5th, 2012

Florida Sinkholes Mapping, Using ArcGIS 9.3

The news of the Karst sinkhole, that just occurred behind the home at 4926 Indian Deer Rd, in Windermere, Florida, got me thinking about the availability of sinkhole data in the state of Florida. Although it about one year out-of-date, I did manage to find some GIS data on Florida sinkholes. I created a basic static map, which can be viewed at

I am creating a time-lapse GIS map of the sinkholes of Florida, as well. I am using the temproal tools of ArcGIS 9.3 for this animation, which should be online within the day.

Blank Edges in Hillshades

Sunday, March 2nd, 2008

When mosaicking DEMs, sometimes gaps of “nodata” result. Here is a technique that I employed to address this.

A Starting Point

Friday, February 29th, 2008

This is a starting point for what I hope to be a discussion forum for my experiences in GIS.