[postgis-users] Off Topic: ham radio modeling over open source

[Juanse]

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Hi every one and sorry before hand for this off topic requirement

Under a non profit organization sponsoring we are developing an internet =
access system for isolated school based on ham radio data transmition. =
On this effort we are looking for any info regarding the siting of =
antenas /repeater. We would like to explore the modeling of the signal =
taking care of topography to define the best arquitecture to supply all =
school at least cost.

We have 1:50.000 digital topographic maps of the study area, and it =
available either through mapinfo/vertical mapper or postgis/mapserver.

Under our preliminary research there are a couple of comertial software =
on the range of US$500 to US$5000, and some basic possibilities under =
opensource (like splat http://www.qsl.net/kd2bd/splat.html).=20
SPLAT! imports topographic data in the form of SPLAT Data Files (SDFs) =
that may be generated from a

number of information sources. In the United States, SPLAT Data Files =
are most often derived from U.S.

Geological Survey Digital Elevation Models (DEMs) using the usgs2sdf =
utility included with SPLAT!.

Any one know of  tools to derive DEM like the ones need by splat SDF =
from contour lines?

Any one knows of other open source tool that could be usefull for our =
purposes?



Sincerely



Juanse

temuko-Chile






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