This kind of application is more apt to be used with overlays.
I also find limiting the need to use multimaps, it's a complex nerdy procedure. You should either hardcode a zoom limit or give the users a choice either in the general preferences or in the multimap creation phase. The multiply option doesn't work, I get a washed out image, multiplying always darkens the image in any app I know of.Ī slope map isn't useful at low zoom levels and drags the performances down. The most common approach to avoid this problem is to calculate a larger area and then crop the borders.
In the case of hillshading it is just visually annoying, but for slopes I assume calculations are not reliable there. There are visible tile seams, and this should not happen. I can build the files for the most common schemes if you want. You can let the user chose the scheme with a custom button or in the preferences. Would it be possible to have multiple schemes? I think building an interface for this would be cumbersome at the moment, but adopting the GDAL text files would be easy: just create a dedicated folder in the preferences where you put some default schemes and where the user can store optional custom ones. This rises the first request: there are different school of thoughts about colour schemes, and they are equally valid. I say they "look right" because my winter maps are actually using a different colour scheme so it's not a precise comparison. It looks like they match well enough, so I'd say the calculations look right (assuming you used the colour scheme I suggested in the other thread). I created a multimap with my summer maps+slope map created with custom DEMs (out of LIDAR data) and compared with my winter maps. I don't see the options for the measure tool, are they already implemented? That said I'm not against the feature, I worked a lot on this kind of maps in the last three years, I'll get back later when I have a little more time. Unfortunately most people is not able to establish if the data they have is good or not, I've seen it in several discussions on dedicated forums. Skitourers use slope maps especially to estimate avalanche risk, so doing slope evaluation on bogus/rough data is not a good idea. Those general purpose DEMs are good for large scale evaluations (flood paths, for example) but not for small scale terrain analysis. You can't see it in a rendering, but data analysis shows the the EUDEM is off by 100 meters about the highest summit in this area. " alt="" class="bbc_img" /> HS_DTM_Piemonte by Maki, su Flickr " alt="" class="bbc_img" /> HS_VFP_DEM1 by Maki, su Flickr " alt="" class="bbc_img" /> HS_EUDEM by Maki, su Flickr Overlap them and see how shape and sometimes position of the reliefs change.
I'll try the beta this week and report back but, just to give you a visual clue about how bad DEMs can be here are three screenshots of the same area (Monviso, Piedmont, Italy) rendered with GDALDEM from EUDEM (allegedly an average between ASTER and SRTM), ViewFinderPanorama's DEM1 (nobody really knows the source), and LIDAR scans from the local government (resampled to match the DEM1 resolution and projection). How likely is it that Qmapshack will be added to the Mint repositories in the near future?Īlternatively, can anyone provide me clear plain English instruction for installing QMapshack that don't involve too many steps where I could go wrong (because I am relatively new to Linux).Results can only be as good as the input data.
QMAPSHACK LOAD A MAP INSTALL
However, the only instructions I can find for compiling and installing are in German (not English) and they appear to be very complicated and tedious (refer ), so I am not persuaded to install the software via that method. I have exhausted all the alternative suggestions). In particular, I believe that QMapshack can handle the necessary Garmin *.img map format files and is able to handle GPS tracks that I can draw/edit and save (refer: & ).Īpart from from QMapshack, there are no viable Linux alternatives to Basecamp that would suit my purposes (ie. I use Basecamp mainly for planning bush walks and also for archiving the tracks of my walks.
QMAPSHACK LOAD A MAP PC
I would like to run Qmapshack in Linux Mint so that I can completely remove Windows from my PC and use only Mint.Ĭurrently, I use Garmin Basecamp in Windows as my main GPS mapping application.
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