Archive for the ‘ArcGIS 9.3’ 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!

An Earthquake Series Animation, Using ArcGIS 9.3

Saturday, April 14th, 2012

After seeing a video that went viral, by StoryMonoroch, on YouTube,, I decided to figure out how to accomplish something similar, using ArcGIS 9.3.

My first step was to get some earthquake data. I chose to use earthquake data from the US Geological Survey (USGS), that covered the previous 7 days, for earthquakes of 2.5 magnitude or higher. The link to this data is

The next step was to convert the date and time field into a format that ArcGIS animation tools would work with. I decided on using the format, YYYYMMDDHHMMSS, as it would be relatively easy to create the formulas necessary to convert the USGS data into.

The webpage with this is located at: