Hi,
Georg Vollnhals schrieb:
Hi Ralf,
I am a pure FlightGear user (since very early versions) and scanning the
developers mailing list regularly.
After your announcement I first flew the scenery from EDNY two days ago
and now downloaded, installed your improvements and did several VFR
flights with my ICAO chart and a more detailled street chart. Congrats!
This is really a big step forward to increase the possibility of
realistic VFR flying (next version with modelled NOVEMBER and ECHO :-) ?).
For those not familiar with the vicinity of EDNY: NOVEMBER and ECHO are
compulsory reporting points located above significant street resp.
railroad tracks. Well, placing reporting points at significant landmarks
is probably custom at nearly all airports, isn't it?
As I said in the original announcement of the scenery screenshots, a
huge number of streets, railroads, streams and rivers were digitised.
You may want to have a look at the Status-page
(http://web44.netzwerteserver2.de/209.0.html) where the digitalisation
status of line- and polygon-data is shown.
However, those data did not make it to the current scenery release as
TerraGear choked, obviously due to the massive density of data. I'm
going to further investigate this - maybe with a little help from the
experts on this list - and I hope that we can at some point release at
least some compromise version between nearly no linedata and 1 FPS
;-) The current selection of the data subset kept is arbitrary and not
necessarily sensible.
At this point I'd like to emphasise the great work of my project
colleague Ingrid, who has done the whole digitalisation of the streets.
(I'm beginning to feel guilty for all your congratulations being
attributed to me ;-) )
Regarding VFR-training we'd like to take what we get in terms of
geographic data, as after all in reality you don't see only those
streets on the ground which are actually on your map. I'm no pilot
myself (yet? ;-), but it was confirmed to me that confusing one street
with another does happend and may be a serious navigation problem.
Ingrid also models the typical cloverleaf-form of freeway intersections
as significant landmarks. However, in the current release the line
widths for the access roads seem to be a bit underestimated so these are
not that easy to identify.
[SNIP]
With your help (tutorial) and
after getting LINUX and TerraGear to a point where I can use it I would
like to do so and (naturally) share my work with all interested when
there will be a place to put it.
My top priorities are now modifying the shapefile-reader in TerraGear to
also understand line- and point-data, as to replace the quick'n'dirty
GRASS-specific tool currently mentioned on the project webpage, and then
writing documentation for getting started with digitalisation with
GRASS. The latter will take some time, so bear with me.
I did some modifications to the GRASS-CVS-version which help for
digitalisation and will make patches, scripts and GRASS-binaries for
Windows/Cygwin and - if necessary - Linux available.
There's still lots of general challenges left. For example, those of you
who've tried the scenery may have noticed some elevation anomalies in
the area of the islands and the Rhine mouth near Altenrhein (LSZR).
There the water has an upwards tendency toward the land mass, which
doesn't look quite realistic.
Ralf
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