As all srtm tiles are processed, I’ll compress them as zip files tonight. Well, the command is simple:
for i in $(ls); do zip $i.zip $i && rm $i; done
Archive for the ‘Neogeography’ Category
Deflating the whole world
Friday, November 14th, 2008
Support for Google Satellite images dropped from Viking sourcecode
Thursday, November 13th, 2008Today, Quy Tonthat, the maintainer of Viking, announced that he dropped the support for Google Mas from Viking “due to requests from Google”. Frankly, it was less surprising that Google excludes other applications from using their photo material, as they did with Gaia back in 2006. Noone should complain. Google brought us cool stuff with its maps and Google Earth Software for free. It’s up to Google to decide how their data must be used.
That being said, I’ll keep a copy of revision 824 on my hard drive :) .
Tiny Geocoder, openstreetmap, housenumbers
Tuesday, November 11th, 2008Webmeister mentiones the Tiny Geocoder, a tool to get geocoordinates after passing an address. Such geocoding, of course, is needed for many Web 2.0 geolocation based services. Unfortunately, you need huge amounts of data before you can create such a service.
While openstreetmap has data down to street name level, we still lack housenumbers. And it will last a while until we have them in our database. But: We will have such data. When? We will have 98% of all housenumbers for germany in two years. Sure? No. But likely.
Mapping housenumbers with osm2go
Tuesday, November 11th, 2008Not really efficient, but osm2go makes it possible to map house numbers “on-the-go”. Just the right thing for a walk on a warm November evening (please don’t bother me with global warming theories ;-) .
World creation finished – almost
Tuesday, November 11th, 2008The great script processing height lines from srtm data processed its last tile on 2008-11-10, 15:31h. The second quadrant took the most time, as it contains huge portions of the landmasses in Africa, Europe and Russia.
Some particular tiles are missing for some reason, and the “border” tiles (north-, south-, east- and westmost tiles) haven’t been processed at all. srtm2osm cannot cope with longitudes like 180 and -180 or latitudes like -90 and 90. My attempt to deduct one tenth of those values led to unacceptable system resource usage by srtm2osm. Probably I will not care much about those tiles and process them any time later. But I need to identify and process the other aforementioned tiles.
SRTM-processing – the never ending story?!?
Saturday, November 8th, 2008Well, since I reformatted my hard drive using ext3, the scripts are running without any further issues. Quadrants 1, 3 and 4 already are finished, but quadrant 2 still will need a while: It just hit lat 35 and thus still has to process central europe and russia completely.
After that, I’ll process the boundings of the map; the current run omits the outmost rows and columns of tiles due to a limitation in srtm2osm: it cannot cope with the values of 180 and -180 for the longitude. So I decided to process the 1076 tiles of the bounds as an extra run.
First mapping using OSM2Go
Friday, November 7th, 2008Restarting the global warming script
Thursday, November 6th, 2008On sunday, 2008-11-02, evening, I again restarted the script which creates the heightlines. Why? Heck, it seems that the used file system (vfat) limits the amount of files per folder. My code reported “Disk full”, while there was still space available on the disk. After some trial and error, I jsut reformatted the drive, but using an ext3 file system this time. How should I say? Finally, it’s up and running since then now. (more…)
And on the 8th day, god redesigned the whole planet…
Sunday, November 2nd, 2008Due to some problems concerning file naming and filesystem errors, I decided to completely restart from scratch. I have dropped all blanks from the file naming scheme, and prefixed them so there are no leading dashes in any of the filenames. (more…)
Why blanks and leading dashes in filenames are both “Donts”
Friday, October 31st, 2008The generation of contour lines causes some unexpected troubles. After hitting the 60th latitude, it produces empty tiles only. I have no clue yet why.
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World creation script hits Karlsruhe
Tuesday, October 28th, 2008Today at 13:05h the script which creates contour lines for the complete world hit Karlsruhe. I’ve not been at home all day, so sorry for the delayed post :) .
“Earth-creation script” continues
Thursday, October 23rd, 2008Due to storage space limitations, the “earth-creation” script was discontinued for a couple of days. Meanwhile it is up and running again, processing the globe around N30°.
Navit for biking: useful, but not ready for »Joe Average«
Sunday, October 19th, 2008Last weekend I thought it would have been the last warm and sunny one this year, but I was wrong. So guess what, I’ve been to Wissembourg by bike again. Having OSM data displayed through Navit on the N810 is a great joy and pleasure, especially the many details I added during the last months. The display of the N810 just is marvellous, you even can read it in direct sunlight. Its colours are excellent.
I noticed the following issues in Navit which we should addredd during the next months: (more…)
Mapping the »Karlsruher Grat« area, again
Sunday, October 19th, 2008So where the heck have I been today?!? Well, I visited the »Karlsruher Grat« again to complete some mapping.
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SRTM script hits the Equator
Thursday, October 16th, 2008My script, responsible for global warming, hit the equator yesterday. As I was on the road, here’s the delayed entry. Currently it processes the tiles along N13°. Still a lot of power to be wasted :) .
Draft of the “next generation” OSM license available
Monday, October 13th, 2008OSMF have posted a draft of the upcoming OSM license. Fred kindly has translated it into german language. If you are interested in more details, maybe the archive of legal-talk is of interest for you.
Continued SRTM processing
Monday, October 13th, 2008First GeoEye-1 sample image published
Friday, October 10th, 2008I wonder if Yahoo has something comparable in the pipeline. BTW: Does this mysterious place named »Kutztown« really exist :-) ?!?
Downloading the whole world to your hard drive
Tuesday, October 7th, 2008Ever wanted to download the whole world to your hard drive, while converting the data to elevation lines? No prob:
inc=1;for y in $(seq -89 $inc 89); do for x in $(seq -179 $inc 179); do mono ./srtm2osm/bin/Srtm2Osm.exe -bounds1 $y $x $(($y+$inc)) $(($x+$inc)) -large -step 40 -cat 1000 200 -o "srtm2osm-tiles/$y $x $(($y+$inc)) $(($x+$inc)).osm"; done; done
This theoretically should cache the complete SRTM data to your hard drive and generate some OSM files with contour lines. srtm2osm seems to have some memory issues so keep $inc between 5 and 10 degrees. srtm2osm is a great tool anyway. Thanks Igor!
Bikemap.net showing bikeroutes
Tuesday, September 30th, 2008Bikemap.net shows a mashup, including OSM maps. Tours can be downloaded in GPX format. It’s somewhat similar to gps-tour.info. I wonder why they didn’t use the cyclemap tiles?!?