okansas.blogspot.com

okansas.blogspot.com
Occassional thoughts about orienteering

Friday, December 26, 2008

An experiment with a Lidar basemap

Here is a low effort/high tech basemap I put together yesterday.

I downloaded Lidar bare earth data and created the contours at 2.5 meter contour interval. I ran the trails wearing a little GPS and put in the trails from the GPS. I used Lidar-based DEMs (digital elevation models?) to get the stream beds (an example below shows a bit of the DEM).

I described this as a low effort/high tech basemap. Low effort means not a lot of time. Downloading and converting the Lidar contours took maybe 20 minutes. Exploring the area with the GPS and taking a few notes took maybe 80-90 minutes (the area is 1K). I put in about 45 minutes of time drafting (mainly the trails and adding the stream beds).

If you're familiar with local O' maps, you should recognize the map as part of the old Rockcrusher map on the south shore of Clinton Lake.

Back to okansas.blogspot.com.

posted by Michael | 11:24 AM

4 comments

Comments:

are the LIDAR data downloadable for free in the States?
which areas are available?

this is the future of orienteering maps, I'm looking forward to survey my first map with lidar data, I think that'll be amazing

remo madella ,italy

# posted by

rem : 8:05 PM

Are those remnant Civil War fortifications on top of the plateaus, or just nesting sites of the Kansas subspecies of the Bald Eagle?

# posted by

Anonymous : 8:47 PM

Remember, loess is more,

# posted by

Anonymous : 10:09 PM

Remo, there are places within the US with free Lidar available. I'm lucky in that one of those areas is several counties in Kansas. I'll write up a few notes and post something today about where the data are and how I'm using them.

Anonymous, the area at the top of the hill is an old rock quarry. The trail that runs up the hill to the quarry is the old "Rockcrusher Road". There is no loess on this map.

Michael

# posted by

Anonymous : 7:42 AM

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