Splitter - missing area, trim not working
Hi, I'm trying to create contour map of Europe. I have created a rectangle area with contours using phyghtmap and then clipped it to europe.poly using osmosis. I'm working with splitter 421. My first split of data went wrong, some parts of north Scandinavia was missing. After some trying, I have found that adding option --polygon-file=europe.poly helps and map contains all data. But at the same time trimming of tiles stopped working and I'm getting some big empty tiles. I have attached a picture, showing all examples of splits. You can see, that without bounding polygon trim works but some data is missing. And with polygon trim doesn't work. My map will be transparent, without background polygon. I prefer to get tile area covering only existing data, which require trim to work. And I don't like empty tiles. I'm not sure what could help to debug this problem. Source data is about 1.3GB, I can upload it. -- Best regards, Andrzej
Hi Andrzej, I think the problem is that contour data data contains large empty areas on sea. I see two solutions: Calculate the split file for the normal OSM data and use that also for the contour data, or use a higher maxnodes value for the contour data. Gerd Date: Wed, 1 Apr 2015 18:04:53 +0200 From: popej@poczta.onet.pl To: mkgmap-dev@lists.mkgmap.org.uk Subject: [mkgmap-dev] Splitter - missing area, trim not working Hi, I'm trying to create contour map of Europe. I have created a rectangle area with contours using phyghtmap and then clipped it to europe.poly using osmosis. I'm working with splitter 421. My first split of data went wrong, some parts of north Scandinavia was missing. After some trying, I have found that adding option --polygon-file=europe.poly helps and map contains all data. But at the same time trimming of tiles stopped working and I'm getting some big empty tiles. I have attached a picture, showing all examples of splits. You can see, that without bounding polygon trim works but some data is missing. And with polygon trim doesn't work. My map will be transparent, without background polygon. I prefer to get tile area covering only existing data, which require trim to work. And I don't like empty tiles. I'm not sure what could help to debug this problem. Source data is about 1.3GB, I can upload it. -- Best regards, Andrzej _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
El 01/04/15 a las 18:54, Gerd Petermann escribió:
Hi Andrzej,
I think the problem is that contour data data contains large empty areas on sea. I see two solutions: Calculate the split file for the normal OSM data and use that also for the contour data, or use a higher maxnodes value for the contour data.
Gerd
Date: Wed, 1 Apr 2015 18:04:53 +0200 From: popej@poczta.onet.pl To: mkgmap-dev@lists.mkgmap.org.uk Subject: [mkgmap-dev] Splitter - missing area, trim not working
Hi,
I'm trying to create contour map of Europe. I have created a rectangle area with contours using phyghtmap and then clipped it to europe.poly using osmosis.
I'm working with splitter 421. My first split of data went wrong, some parts of north Scandinavia was missing. After some trying, I have found that adding option --polygon-file=europe.poly helps and map contains all data. But at the same time trimming of tiles stopped working and I'm getting some big empty tiles.
I have attached a picture, showing all examples of splits. You can see, that without bounding polygon trim works but some data is missing. And with polygon trim doesn't work.
My map will be transparent, without background polygon. I prefer to get tile area covering only existing data, which require trim to work. And I don't like empty tiles.
I'm not sure what could help to debug this problem. Source data is about 1.3GB, I can upload it.
-- Best regards, Andrzej
Why don't you pass europe.poly directly to phyghtmap? That way you will save osmosis step and also downloading and processing a lot of hgt data that will later discarde. I'm away from home and can't read my contours script now, but I'm sure about this step.
Hi Carlos and Gerd, I tried once bounding poly in phyghtmap and it didn't worked for me. I don't remember what was wrong. No problems with osmosis. Now I need some solution for trim. I get usable split with polygon-file in splitter, but I'd like to remove empty areas. Is trim in splitter disabled by bounding poly? -- Best regards, Andrzej
Hi Andrzej, popej wrote
Is trim in splitter disabled by bounding poly?
yep, see docu: http://www.mkgmap.org.uk/doc/splitter.html ;--no-trim : Don't trim empty space off the edges of tiles. This option is ignored when --polygon-file is used. Gerd -- View this message in context: http://gis.19327.n5.nabble.com/Splitter-missing-area-trim-not-working-tp5839... Sent from the Mkgmap Development mailing list archive at Nabble.com.
Hi Gerd, I'm trying to minimize map size and I feel, that trim can help a bit. Probably I'm wrong, these are empty parts anyway. Thanks for advices. -- Best regards, Andrzej
participants (4)
-
Andrzej Popowski -
Carlos Dávila -
Gerd Petermann -
GerdP