TransDEM Forum

TransDem 2.6 has a list of map service providers when the provided sample .xlm is loaded into it.
Is it possible to add a map tile server not provided in that list? I'd like to use my local municipality's online ESRI based map for a source if I can. Is this possible? If so, how?
I have to dig a bit deeper into the Region's website to see if they have this data available for download in the Open Data portal, but I suspect no.

Yes, that's possible, as long as the service adheres to the de-facto standard, in particular tile size, addressing scheme and map projection. If it's hosted by ESRI you can try with the preconfigured ESRI services as template. Some service hosters provide the map tile service details on their website. Otherwise you may need to monitor the web traffic to find out the addressing. Since almost every web service is https these days you need a "Man-in-the-middle" tool. You can try Wireshark or Fiddler Classic. Fiddler is easier to use. Use utmost care if you activate such a man-in-the-middle, you will be losing HTTPS security while that tool is running.

My apologies for the tardy acknowledgment of your reply @geophil. I appreciate your anser, and I will experiment. I suspect it'll be a challenge.