MOD function for contours
Say you have 1’ or 5’ contours with an elevation field. Instead of calculating a new field or making selections, you can use the mod function. I find it extremely useful. In the definition query tab of your layer properties: mod(“Contour”,25)=0 The mod expression above divides the Contour value by 25 and throws out any […]
Ohio GIS Cartography Workshop
I conducted a cartography workshop at the 2013 Ohio GIS Conference. If you attended the conference and would like to download the workshop materials hit the link below to download a zip file with everything you’ll need. Unzip the contents to your desktop and you are good to go. To get started, navigate to the 02_Exercises […]
David Rumsey Map Collection Viewing
Recently, I had the opportunity to view much of David Rumsey’s map collection at his house in San Francisco. As an attendee of State of the Map, Open Street Map’s (OSM) annual conference, I was invited to this special viewing and couldn’t pass on the chance to meet David and also see and touch a […]
Integrate Symbol and Label
This technique saves some space and brings a refined look to the symbology in your maps. Integrating a feature’s label into its symbol makes for a professional style that should impress your client. Begin by building a symbol that will accommodate a label. In this case, I have a single digit number, which is basically […]
A Multivariate Line Style
Wanted to share some symbology I developed for an electric utilities map recently. There were multiple variables to portray over aerial imagery. The first thing I did for this map was to adjust the imagery to black and white and tone down the contrast to really let the lines pop, then I started working on […]
