ArcGIS Desktop

Use Modulus to Identify Layers Divisible by a Number

Recently I had a need to filter features in a layer by a specific numeric value in ArcGIS Desktop. Specifically, I created contour lines at one foot intervals, and needed to display the 10 foot contour lines with a thicker line and label them. This is accomplished by creating a

ArcGIS Desktop

ArcGIS for Desktop 10.1 Add-In with Custom Toolbox

Note: An example and additional explanation of this is available on ArcGIS.com. ArcGIS for Desktop 10.1 introduces the capability to create custom Add-Ins using Python. Unfortunately this new functionality does not include the capability to create a custom dialog to enter parameters. Including a custom toolbox with the

ArcGIS Desktop

Create List of Unique Table Values using Python for ArcGIS Analysis

NOTE: I have updated this function for 10.1 and consolidated some of the code. The sample is available in a new post, Create List of Unique Table Values using Data Access Module. Necessity is the mother of invention and as of late, this means I have learned to use

analysis workflow

Iranian Ballistic Missile Range

Being a GIS geek, when reading the New York Times and The Economist on my iPad, current events in the Middle East always get me to thinking about how the geography all fits together. During the last few weeks and especially the last few days, tensions with Iran are at

ArcGIS Desktop

Esri Disaster Response

Today I received an email highlighting the assistance Esri is standing by ready to offer for those assisting with disaster response. This email included a link directly to the Esri Disaster Response Webpage. Types of assistance include everything from software to data and even consulting. Most all types of disasters

ArcGIS Desktop

Creating Map Books Using Data Driven Pages

With the release of ArcGIS Desktop 10 comes the ability to create data driven pages. Data driven pages facilitate creation of multiple maps from a single layout. This means the layout only has to be created once. Referencing a layer in the map, data driven pages moves from one feature