Hi Frank

Thanks for looking into that.

Just discovered what foxed me:

Unusually ,there was no error message telling me that neither the .hgt nor .zip file were found .

Perhaps, the error message does not occur because I'm using usedummydata?

In which case, it would still be very useful to know if it can't find .hgt or .zip

This is what I get when I parse the large pbf

C:\ProgramData\Garmin\Maps\osm68775599.gmap\Product1>(E:\BuildDEMFile5.exe -d 37
761652\37761652.DEM --hgtpath=E:\Dem\UK\ --tre=37761652\37761652.TRE --dlon=2.77
7777777777778e-4;5.555555555555556e-4;0.0011111111111111;0.0022222222222222;0.00
88888888888889 --overwrite=true --usedummydata=true )
BuildDEMFile, Version vom 16.11.2017, Copyright © FSofT 2017
data from TRE file '37761652\37761652.TRE'
5 zoomlevel
number of subtiles 133 x 85 (most right column 95 width, undermost row 3 height)

left -0.087890625°, top 51.2841796875°, width 2.373046875°, height 1.494140625°
pointsize 0.000277777777777778° x 0.000277777777777778°
number of subtiles 66 x 43 (most right column 112 width, undermost row 2 height)

left -0.087890625°, top 51.2841796875°, width 2.373046875°, height 1.494140625°
pointsize 0.000555555555555556° x 0.000555555555555556°
number of subtiles 33 x 22 (most right column 88 width, undermost row 1 height)
left -0.087890625°, top 51.2841796875°, width 2.373046875°, height 1.494140625°
pointsize 0.0011111111111111° x 0.0011111111111111°
number of subtiles 16 x 11 (most right column 108 width, undermost row 33 height
)
left -0.087890625°, top 51.2841796875°, width 2.373046875°, height 1.494140625°
pointsize 0.0022222222222222° x 0.0022222222222222°
number of subtiles 4 x 3 (most right column 75 width, undermost row 41 height)
left -0.087890625°, top 51.2841796875°, width 2.373046875°, height 1.494140625°
pointsize 0.0088888888888889° x 0.0088888888888889°
HGT-Daten lesen ...
Höhen für 0° .. 1° / 50° .. 51° eingelesen, (nur Dummywerte)
Höhen für 0° .. 1° / 49° .. 50° eingelesen, (nur Dummywerte)
Höhen für -1° .. 0° / 51° .. 52° eingelesen, (nur Dummywerte)
Höhen für 1° .. 2° / 50° .. 51° eingelesen, (nur Dummywerte)
Höhen für 2° .. 3° / 50° .. 51° eingelesen, (nur Dummywerte)
Höhen für 1° .. 2° / 49° .. 50° eingelesen, (nur Dummywerte)
Höhen für 2° .. 3° / 49° .. 50° eingelesen, (nur Dummywerte)
Höhen für 2° .. 3° / 51° .. 52° eingelesen, (nur Dummywerte)
Höhen für -1° .. 0° / 49° .. 50° eingelesen, Werte -23 .. 358
Höhen für 0° .. 1° / 51° .. 52° eingelesen, Werte -16 .. 273
Höhen für -1° .. 0° / 50° .. 51° eingelesen, Werte -6 .. 268
Höhen für 1° .. 2° / 51° .. 52° eingelesen, Werte -10 .. 190
Einlesezeit 0.7s
encoding 15057 Subtiles ........................................................
................................................................................
................................................................................
................................................................................
......
15057 Subtiles encoded
runtime 12.4s

Anyway , its a great piece of software and am using it daily.

Nick

On 23/11/2017 14:48, Frank Stinner wrote:

Hi Nick,

there are 2 little problems in your map mapdem.gmap.

#1:
I have rebuild your DEM file. Maybe, builddemfile had the N50E000.hgt.zip or N50E000.hgt not found and you have only "dummydata" in your file. "dummydata" means a valid DEM with "no data"-points.

builddemfile --hgtpath=yourpath --dem=87827699.dem --tre=87827699.tre --dlon=0.00027777;0.00055555;0.00111110;0.00222221;0.00888884

create a DEM file with 23781 Byte.

#2:
Like Andrzej wrote: you need also a new TDB. I have used a quick but very dirty method: I have only for TDB-build temporary created the Tile IMG's ov.img and 87827699.img.

gmtool -i mapdem\*.* --join=tile -o ov.img
gmtool -i 87827699\*.* --join=tile -o 87827699.img
gmtool -i *.img --mapsource=pid:1;fid:3927;cp:1252;ov:ov.img;tdb:neu.tdb;noov;notyp;nomdx;nomdr;noinst--mapfamilyname=mapdem --mapseriesname=mapdem --description="Test preview map" --routable=1 --highestroutable=24 --maxbits4overview=18 --hasdem=1 --hasprofile=1 --copyright=*I* -o . --overwrite
ren mapdem.tdb mapdem.tdb_
ren neu.tdb mapdem.tdb
del *.img

Of course, in your little demo we can not see a shading. But we can see the values for N, E and height in the basecamp status line.

By the way, be careful wit --usedummydata. It's only interest for sea-areas, where don't exist a HGT. But if a HGT for land is absent, we have a hole in our map without an error message!

Frank
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