UK SRTM 1 arcsec DEM data

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oldgreyowl
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Re: UK SRTM 1 arcsec DEM data

Post by oldgreyowl »

Many thanks, Simenon.

keith
secludedsfx
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Re: UK SRTM 1 arcsec DEM data

Post by secludedsfx »

Anyone got a copy of this data as I'm quite keen to get my hands on it (the site with the converted data is down).
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oldoakcom
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Re: UK SRTM 1 arcsec DEM data

Post by oldoakcom »

Yes i have the data but i dont know how we can exchange it, as its a large file

maddog
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alan2
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Re: UK SRTM 1 arcsec DEM data

Post by alan2 »

alanch wrote:I've just tried this out in my test route, and it appears to have at least one of the problems that the data set in the library here has. Importing data close to a latitude degree boundary still crashes TS2014 in my installation - I can import the data anywhere else without problems, but if I go too close to 54 degrees North it crashes every time.

Could someone else try this and see if they get the same results. I suspect this is a bug in TS2014 import routine rather than a fault with the data.
I can Confirm that this error occurs... But it occurs with all Tile boundries where one tile loads data from two files. I had no internet for the last 10 days... so I sat playing around in Railworks. I loaded a section of terrain I had generated origionally back in TS2012... Railworks Crashed to desktop.

I tried loading the tile several times untill I realised that the lon value was 53.0013 - In this time the boundry occurred. I removed the N53W002.hgt file and the terrain generated fine. I then removed the N52W002 and replaced the N53W002 file and all worked fine. As soon as I tried with both files in place... RW crashed. (with the single file it only loaded half a tile of data and then a drop to 0 height. )

If I moved above the tile by one and generated 1x1 then the tile generated perfectly fine no matter how many hgt files I had. As soon as Railworks tried to load 2 files.. some kind of memory bug happened and it crashed. (could this be to do with Railworks new routine for loading tile data and someone reduced the allocated memory for file loading to 26mb... instead of 52 mb to account for 2 files of data being loaded ? - To improove memory management in the routine. *NB forgetting about the double file loading requirement)

Note to RW Dev's : Try increasing the memory handling for the file loading during the terrain generation from hgt files. seems not to be assigning enough and crashing. The import can handle having no data there. but when it tries to load two files it does something strange and to me it looked memory related. (my RW memory usage increased 27mb as the tile tried to load, but I know the file's load 51mb of data at least. 26mb being the file size of .hgt file.)
The error did not occur with the old routine used by TS2012 ? when you had to press T to generate terrain.
Alan Heath
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