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

Tue Feb 18 01:18:36 EST 2003

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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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<DIV><FONT face=3DArial size=3D2>Hi every one and sorry before hand for =
this off=20
topic requirement</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Under a non profit organization =
sponsoring we are=20
developing an internet access system for isolated school based on ham =
radio data=20
transmition. On this effort we are looking for any info regarding the =
siting of=20
antenas /repeater. We would like to explore the modeling of the signal =
taking=20
care of topography to define the best arquitecture to supply all school =
at least=20
cost.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>We have 1:50.000 =
digital&nbsp;topographic maps of=20
the study area, and it available either through mapinfo/vertical mapper =
or=20
postgis/mapserver.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Under our preliminary research there =
are a couple=20
of comertial software on the range of US$500 to US$5000, and some basic=20
possibilities under opensource (like splat <A=20
href=3D"http://www.qsl.net/kd2bd/splat.html">http://www.qsl.net/kd2bd/spl=
at.html</A>).=20
<B><FONT face=3D"Times New Roman" size=3D2>
<P>SPLAT! </B></FONT><FONT face=3D"Times New Roman" size=3D2>imports =
topographic=20
data in the form of SPLAT Data Files (SDFs) that may be generated from =
a</P>
<P>number of information sources. In the United States, SPLAT Data Files =
are=20
most often derived from U.S.</P>
<P>Geological Survey Digital Elevation Models (DEMs) using the =
</FONT><B><FONT=20
face=3D"Times New Roman" size=3D2>usgs2sdf </B></FONT><FONT =
face=3D"Times New Roman"=20
size=3D2>utility included with </FONT><B><FONT face=3D"Times New Roman"=20
size=3D2>SPLAT</B></FONT><FONT face=3D"Times New Roman" =
size=3D2>!.</FONT></P>
<P><FONT size=3D2>Any one know of&nbsp; tools to derive DEM like the =
ones need by=20
splat SDF from contour lines?</FONT></P>
<P>Any one knows of other open source tool that could be usefull for our =

purposes?</P>
<P>&nbsp;</P>
<P>Sincerely</P>
<P>&nbsp;</P>
<P>Juanse</P>
<P>temuko-Chile</P>
<P>&nbsp;</P>
<P><FONT face=3D"Times New Roman" size=3D2><FONT =
face=3DArial></FONT></FONT>&nbsp;</P>
<P><FONT face=3D"Times New Roman" size=3D2><FONT =
face=3DArial><BR>---<BR>Outgoing mail=20
is certified Virus Free.<BR>Checked by AVG anti-virus system (<A=20
href=3D"http://www.grisoft.com">http://www.grisoft.com</A>).<BR>Version: =
6.0.449 /=20
Virus Database: 251 - Release Date:=20
27/01/03</FONT></P></FONT></FONT></DIV></BODY></HTML>

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