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 Terrain without the sea.

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T O P I C    R E V I E W
ryszard_lewandowski Posted - 24/09/2020 : 01:10:03
Hi, currently DEM file contains 0m ASL area shows nice blue water. Unfortunately, in Poland we have a few quite huge depression area (<=0m AMSL). LK shows that area as a sea what is wrong.

I think that we have two - easy to implementation - alternative solutions:

1. LK shows sea ONLY for 0m AMSL - but not for <0m AMSL. I can prepare DEM file with sea with 0m AMSL and <0m AMSL for depression area.

2. LK has additional config parameter, something like "Display sea for 0m AMSL". So - I can turn it off and prepare map (not terrain) with additional layer contains sea.


I think - both solutions maintain backward compatibility with old maps.
Regards
Ryszard.
6   L A T E S T    R E P L I E S    (Newest First)
ryszard_lewandowski Posted - 28/09/2020 : 21:00:04
quote:
if coast_area is not found in topology file ( or no topology file configured ) terrain altitude is used to paint sea area.


Excellent - it's solution for me. I didn't know about that dependence.

Thanks!
brunotl Posted - 28/09/2020 : 17:31:11
yes i have seen, maybe my first answer is not very clear, i will try to explain...

in very first version of LK8000, terrain altitude < 0 was used to paint sea, but that don't work for lot of country with negative altitude.
to solve this problem, we have include coast_area in topology file and terrain altitude is no more used to paint sea area.
but to maintain backward compatility with hold maps, if coast_area is not found in topology file ( or no topology file configured ) terrain altitude is used to paint sea area.


in your initial post you ask for solution to not paint negative altitude as sea area, answer is simple :
update your topology file to include coast layer, like it's made in this lkm file : https://drive.google.com/file/d/19cvcYDO7JInz8CiJFA-BYSHotauPshkI/view?usp=sharing
ryszard_lewandowski Posted - 28/09/2020 : 15:19:57
quote:
Originally posted by brunotl

yes i'm sure, it's due to your LKM.



Have you seen my previous JPGs? Another version. I have deleted LKM file from LK config - just to be sure. So there are no LKM layers.

Map with terrain ON.




Map with terrain OFF.


brunotl Posted - 28/09/2020 : 11:21:28
yes i'm sure, it's due to your LKM.
but you right, missing layer is not "water_area" but "coast_area".

you can try this lkm file : https://drive.google.com/file/d/19cvcYDO7JInz8CiJFA-BYSHotauPshkI/view?usp=sharing
ryszard_lewandowski Posted - 27/09/2020 : 18:59:15
quote:
Originally posted by brunotl

it depend of LKM file you use, if it include water area, altitude is not used to paint water...



Are you sure? I think that terrain matters. Take a look:

Terrain OFF:


Terrain ON:


I'm using my own LKM file and there is no sea layer.
brunotl Posted - 24/09/2020 : 17:22:39
it depend of LKM file you use, if it include water area, altitude is not used to paint water...

what lkm file do you use ?

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