HistWar
HistWar (international zone) => Communities => Scenarios => Discussion démarrée par: Alfiere le 11 mai 2010, 17:24:24 pm
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If someone is interested to this map I can upload into Histwar Depot.(less attractive until Orendel do not build historical OOB)
Made with Google Earth and Scilab and Google maps for position of villages.
Only the map it is not scenarios.
Attach file is example.
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the map looks great! - please do upload it! :)
CvC
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Ok,Count.
Ok done
Next time i want to try with Auerstadt.
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Preview of Auerstadt satellite 10 km to finish
Made with Google Earth and Scilab and Google maps for position of villages.
Funny to build.
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Downloaded. Thanks for this other map with satellite elevations.
:D
Théo
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Preview of Auerstadt satellite 10 km to finish
Made with Google Earth and Scilab and Google maps for position of villages.
Funny to build.
Ready and upload.
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Auerstedt looks like an excellent effort. Kudos. I must learn how to use the map making tools you have used. :)
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For first thing you have to download a manual of Brucepos
here:
http://www.guggs.de/hwlg/category.php?id=5&session=a5135cced92a023f34f7eab87974c18f
Then need
Google earth
Scilab
A spreadsheet to facilitate the calculations
Now SRTM4.1 is little different from manual of brucepos , but there is another way to download the matrix of reliefs,
if you click on SRTM4.1 on Goggle earth you can select a area and download the matrix of reliefs of that area (is little slow)
you must select ascii....(do not remember) and download with HTTP
You have to try.
Another thing on Google earth in the options you must select kilometers and degree in decimal before you take note of lat and long of top left end bottom right points of map.
Then it is not need the conversion (brucepos speak of conversion because use degree not decimal ,but is very easy make mistake)
Attach pics
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Hi Alfiere,
If I well understand your explainations, there is a new strm system (version 4.1).
Is that the reason why I don't succeed in having the files at the moment ?
Now when I open Google earth and strm, I got tiles with red crosses and I can't download the ascii files : the link is broken.
Do you think I must delete the ancient strm and download the new one ?
Best regards,
Théo
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I have read your post.
At once i have tried and all work for me.
Yes SRTM4.1.
I have saved it and when launch start Google Earth.
When you press on SRTM4.1 tha mask (how in my attach files ) is little slow,but work.
Do you think I must delete the ancient strm and download the new one ?
Try is not bad if you have problems.
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Thankk you. :)
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This my calculations to put in editor (with copy and past) after change with data for specific map ,of scilab and run.
I used openoffice calc how spreadsheet.
For all maps but not for 6km.
Theo take a look and talking about.
(Deleted formulas.)
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This my calculations to put in editor (with copy and past) after change with data for specific map ,of scilab and run.
I used openoffice calc how spreadsheet.
For all maps but not for 6km.
Theo take a look and talking about.
Hi Alfiere,
I totally agree with your calculations.
As I previously said, I also use an OpenOffice calc spreadsheet to do the calculations (thanks to glaude1955).
Comparing with the instructions of Brucepos, the only thing that changes in the calculations is the number of rows and columns which are now of 6001, instead of 1200 or 2400. It's because of the biggest data files we can download now on Google earth.
So the only number to change is in b15 to do the calculation for the Top corner latitude :
c11+b15*c13 =yllcorner+6001*cellsize
The lines for Scilab program are also good. Nothing has changed with previous Brucepos' Instructions.
As you said, this doesn't work for 6 km map.
Thanks a lot for this post.
:D
Théo
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Hello Théodoricus
I am very happy with your confirmation for the calculations.
Clear all doubts.
I think is useful for those wishing to try.
the only annoying thing is to remove the header of the file and save in text format, for a file of 150-180 mega is very long.
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Hello Théodoricus
I am very happy with your confirmation for the calculations.
Clear all doubts.
I think is useful for those wishing to try.
the only annoying thing is to remove the header of the file and save in text format, for a file of 150-180 mega is very long.
Yes indeed, it's very long.
It was better before when we could download data files of 1 degree sub-tiles from the King's College of London because the files were of 1200 and not 6001.
But now we can't because Mark Mulligan (professor of the King's College of London) explains that there is a bug with Google earth version 4.1.
http://www.kcl.ac.uk/schools/sspp/geography/research/emm/geodata
Anyhow, your way to download data elevations files of 6001 is a good alternative.
I hope scenarios creators will use the same method to have really good maps.
Théo
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I do not know this (bug)
Good to know.
But i think that nothing change for to make the same satellite map.
If for 1 degree are used 1200 rows and for 5 degree are used 6000 rows , we have to work only with a bigger file.
There is a problem when the map is between 2 tiles , we have to merge 2 files how explained by Brucepos, but is limiting case.(the code for scilab must change)
Another way is to fill the mask with degree of lat and long that include the map ,to avoid this little problem.
(i have not tried) also in this case the rows are different and something in spreadsheet must be changed.
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But i think that nothing change for to make the same satellite map.
If for 1 degree are used 1200 rows and for 5 degree are used 6000 rows , we have to work only with a bigger file.
I rethink this , now i have some doubt.
My doubt is , is better to have a tile for 1 degree or a tile for 5 degree for to build a better satellite map?
Now i think a tile for 1 degree,but i am not sure.
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I read
The original 5 degree tiles are also sub-tiled for those users requiring easier to manage grids for smaller areas.
The risolution is of 3 arcsec about 90 meters.
Then there is not difference and the risolution is the same, seems to me.
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I do not know because do not work and need another mathematical matrix for 6x4.5 km map.
Maybe speaking with Nix when he created 6 km waterloo map,but i do not remenber.
The map it is good , if there was a little mistake the result it would be a crap map...
Anyway now delete my previous posts if the files will not be compatible, to avoid confusion.
Hello Theo
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Hello Theo
Found the sources.
Here
http://www.histwar.org/forum/index.php/topic,5947.msg77284.html#msg77284
The map it is right because i take a look on google earth of height at Kofering and on Histwar map it is 12 meter.
The difference between kofering place and lowest point real height is 349-338=11 meter.
Then all is right.
With brucepos method all heights are remapped with al least a 0 meter point on histwar map.(all heights are relative heights)
Removing code of remapping with scilap we can to have real heights also in histwar map , but it is better to have a 0 meter point (i agree with brucepos method)
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Hello Theo
Found the sources.
Here
http://www.histwar.org/forum/index.php/topic,5947.msg77284.html#msg77284
The map it is right because i take a look on google earth of height at Kofering and on Histwar map it is 12 meter.
The difference between kofering place and lowest point real height is 349-338=11 meter.
Then all is right.
With brucepos method all heights are remapped with al least a 0 meter point on histwar map.(all heights are relative heights)
Removing code of remapping with scilap we can to have real heights also in histwar map , but it is better to have a 0 meter point (i agree with brucepos method)
Hello Alfiere,
That's great to know that your calculations are correct to obtain the right heights for a 6x4,5 km map in the Map Editor.
Thank you for the link.
Since yesterday, I thought you could not delete your previous post and let your calculations for a map of 6x4.5 km but specifying that it is for Napoleon:Les Grognards. Because maybe it could have been useful for those who continue to play with Napoleon:Les Grognards.
Théo
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Hello Théo
Yes ,very interesting Nix topic.
It is better that i've deleted the procedure for the map calculations for two main reasons.
1)Need a little experience with scilab before use it.(scilab it is very powerful)
2)Romain promise a procedure to make map,it is better wait Romain .
hoping soon ,so you can do other fantastic scenarios for Histwar. ;)
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Hello Théo
hoping soon ,so you can do other fantastic scenarios for Histwar. ;)
I think you can do the same. ;)