XPost: alt.comp.freeware

On Wed, 28 Mar 2018 08:27:23 +0000 (UTC), Bob J Jones wrote:

Do you know of an offline Windows latitude and longitude converter
that will convert degrees minutes seconds to Degrees decimal Minutes?

The cs2cs command line converter does about any coordinate transformation:

http://proj4.org/apps/cs2cs.html

Input *can* be latitude/longitude, *standard* output is DMS for geographic coordinates.

BeAr
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XPost: alt.comp.freeware

In <news:jqcwylqnn701.dlg@br-ederson.eternal-september.org>, "B. R. 'BeAr' Ederson" <use.replyto@this.is.invalid> wrote:

OziExplorer is "just" a GUI wrapper (like the free QGIS I recommended)
around the functionality of the GIS tools and libraries from the free
open source OSGEO project (and several others). These libraries and
tools are - of course - also available for Linux. Actually, most of
them have been initially developed there; and were just ported to Win
later on.

So for example: Instead of having OziExplorer call up gdal_translate,
you could run it all by yourself.

Wow. Thanks for that useful information.

I don't have anywhere near the skillset required to make use of that information to create a Linux tool that geocalibrates the USGS PDF
topographic maps and then edits and displays tracks on those geocalibrated maps, but that's great to know that the underlying capability exists for a
good Linux coder to follow up on.

Thanks!

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XPost: alt.comp.freeware

On Wed, 28 Mar 2018 19:38:08 +0000 (UTC), Bob J Jones wrote:

I was asked by a friend if this process described below works for Linux in addition to Windows. https://groups.google.com/d/msg/sci.geo.satellite-nav/yONNWAEx23Y/7LpakFp4BwAJ

[...]

So, unless the main capability of stitching USGS PDFs together and geocalibrating them and editing tracks on them is available on Linux,
having this command in linux isn't all that helpful.

OziExplorer is "just" a GUI wrapper (like the free QGIS I recommended)
around the functionality of the GIS tools and libraries from the free
open source OSGEO project (and several others). These libraries and
tools are - of course - also available for Linux. Actually, most of
them have been initially developed there; and were just ported to Win
later on.

So for example: Instead of having OziExplorer call up gdal_translate,
you could run it all by yourself.

BeAr
--
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= What do you mean with: "Perfection is always an illusion"? = ===============================================================--(Oops!)===

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

XPost: alt.comp.freeware

On Wed, 28 Mar 2018 22:08:08 +0000 (UTC), Bob J Jones wrote:

In <news:jqcwylqnn701.dlg@br-ederson.eternal-september.org>, "B. R. 'BeAr' Ederson" <use.replyto@this.is.invalid> wrote:

OziExplorer is "just" a GUI wrapper (like the free QGIS I recommended)
around the functionality of the GIS tools and libraries from the free
open source OSGEO project (and several others). These libraries and
tools are - of course - also available for Linux. Actually, most of
them have been initially developed there; and were just ported to Win
later on.

So for example: Instead of having OziExplorer call up gdal_translate,
you could run it all by yourself.

Wow. Thanks for that useful information.

I don't have anywhere near the skillset required to make use of that information to create a Linux tool that geocalibrates the USGS PDF topographic maps and then edits and displays tracks on those geocalibrated maps, but that's great to know that the underlying capability exists for a good Linux coder to follow up on.

You really don't get it: The programs /are/ all available. QGIS (available
for Windows as well as Linux, Mac, BSD) is currently just the best solution
as a GUI. Suitable for beginners as well as GIS Pro's. But there are other GUI's as well. *And* countless GIS command line tools and libraries.

QGIS also supports geopdf files directly. (No need for conversation.) But
those huge files load (very) slowly. Therefore I did recommend using WMS services. These load nearly instantaneously. No need to load, convert and
store huge amounts of raster data (which soon will be outdated), just to
adjust a couple of track points to elevation contour lines..

BeAr
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I'm sure that you could write such a converter in PowerShell (assuming
you are on Windows), or you could download a free perl implementation
and use a script like this: If an input line contains 3 numbers it
assumes DD MM SS and returns DD MM.MMMM, if two it assumes DD MM.MMM and returns DD.DDDDDD, and a single input is converted from DD.DDDDD to DD
MM SS.S.

#!perl -w
while (<>) {
chomp;
(my $d, $m, $s) = split;
if (defined($s) && $s ne '') { # 3 inputs!
printf("%s %6.4f\n", $d, $m+$s/60); # Return DD MM.MMMM
}
elsif (defined($m) && $m ne '') { # 2 inputs
printf("%8.6f\n", $d+$m/60); # Return DD.DDDDDD
}
elsif (defined($d)) {
$m = $d*60; $d = int($d); $m -= $d*60;
$s = $m*60; $m = int($m); $s -= $m*60;
printf("%2d %2d %4.1f\n", $d, $m, $s); # Return DD MM SS.S
}
}

I've tested this far enough to see that it is accurate at the sub-meter
level, which is far better than needed for map calibration.

Terje

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