A cell phone provider wants to install a cell tower in our neighborhood along a protected ridgeline. I am working with some of the neighbors to see what options our town has to regulate the location of the tower. I have been trying to learn the GRASS system and volunteered to produce a map that will show from where the proposed tower will be seen. I know the proposed location (lat/long) and height of the tower.
I have been running some of the examples in the GRASS book (Open Source GIS:AGrass GIS Approach, 3rd Edition) for line-of-sight calculations (eg, page 152) and can get the examples to work for the NC sample data and the spearfish data. I downloaded elevation data from the USGS (1/3 arc second resolution), but I can't get r.los to work on this data because it is lat/long based and r.los requires XY data. I see there is an add-on module, r.viewshed which can take lat/long coordinates as input. I guess I could also re-project the elevation data. Can someone suggest what map data, what projection, and which module (r.los or r.viewshed) I should use? My goal is to produce a map like that on page 152 showing the area in my neighborhood. I think I understand the basic concepts but I need some guidance to pull the right pieces together. Thank you for your help. Dan -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Line-of-Sight-Viewshed-help-tp5621843p5621843.html Sent from the Grass - Users mailing list archive at Nabble.com. _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
