Re: [talk-ph] talk-ph Digest, Vol 24, Issue 4
On Sun, Jul 4, 2010 at 7:47 PM, Frank Woolf fr...@frankwoolf.com wrote: I do have a problem that maybe somebody can help me with. Access to Samal Island with a vehicle is via vehicular ferry. I have tried may ways to define the ferry route but no matter what I do the GPS will not navigate if I select a destination that includes crossing from the mainland to the island or visa versa. Can anyone suggest what to do? To be able to route from road-ferry-road, ferry routes should be connected to the nearest road in the pier. -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
HI guys, Here's an *initial* webmap showing where the jagged coastlines are as of July 3: http://forge.codedgraphic.com/osm/sawtooth_coastlines/ The larger the circle, the more jagged steps there are to clean up. Sorry, there's no link going to Potlatch or JOSM/Merkaartor. I'll add that up when I learn more of OpenLayers. But for now, this will have to do. Enjoy! Eugene On Mon, Jul 5, 2010 at 9:30 AM, maning sambale emmanuel.samb...@gmail.comwrote: We missed the June target to to finish the 10 largest islands. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities That's OK. All we need is to finish mainland Mindanao and we can set our radar to the next 20 on the list. We are also working on some webmap to visualize the sawtooth. More on that when its ready. On Sun, Jul 4, 2010 at 5:48 PM, maning sambale emmanuel.samb...@gmail.com wrote: I can load it in my public dropbox. On Sun, Jul 4, 2010 at 2:23 PM, Eugene Alvin Villar sea...@gmail.com wrote: Hi guys, Once we are done with the large islands, the next step is to do the smaller islands. Ian Haylock has helpfully provided the PGS coastlines[1] for the Philippines last year[2] which he edited to combine ways. PGS itself was automatically generated by a software by analyzing the Landsat imagery. Unfortunately, Ian's file was hosted on a free file server and has now expired but I think several people on the mailing list managed to download it. I tried opening the file last year in Merkaartor but my old laptop couldn't handle the data. Now that I have a 4GB-RAM laptop, loading the data into Merkaartor is very manageable. Using the PGS coastlines is much, much easier than tracing Landsat by hand. I tried this with Homonhon Island and editing is way faster than actually uploading it[3]. Hehehe. What I did was to delete the SRTM-derived coastline[4] and replace it with the PGS coastline[5]. I think uploading the PGS coastlines is better for the smaller islands. I'll see what we can do to have the PGS coastlines (55MB) uploaded somewhere. [1] http://wiki.openstreetmap.org/wiki/Prototype_Global_Shoreline [2] http://lists.openstreetmap.org/pipermail/talk-ph/2009-June/001071.html [3] http://www.openstreetmap.org/browse/changeset/5129873 [4] http://www.openstreetmap.org/browse/way/4327906 [5] http://www.openstreetmap.org/browse/way/65592780 Eugene On Thu, Jun 17, 2010 at 8:20 PM, maning sambale emmanuel.samb...@gmail.com wrote: UPDATE. Only two islands from the top ten need some coasty coastline love. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections Anyone working on Negros and Mainland Mindanao? -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- http://vaes9.codedgraphic.com ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
[talk-ph] how to get good tracklogs
http://www.mcwetboy.net/maproom/2010/07/twentyfive_gps.php -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
@ ed, The technique is outlined here: http://wiki.openstreetmap.org/wiki/Talk:WikiProject_Philippines/Coastline_Corrections Couple of suggestions: 1. short link to the coastline correction wikipage 2. enable link to editors only at higher zoom level (perhaps 15-17?) 3. should be an osm-ph image of the week On Tue, Jul 6, 2010 at 9:20 AM, Ed Garcia eppgar...@gmail.com wrote: Wow! amazing ... how do you detect sawtoothness? can you teach this at the skillshare? OSM genius ka talaga! Anyway, I take note of the sawtooth patterns between Lucena and Pagbilao Quezon ... I have corrected this already but the sawtooth appears only on higher zoom-out levels now. Does this mean it is good as done now? It still appears on yoursawtooth_coastlines map though. ed On Tue, Jul 6, 2010 at 1:04 AM, Eugene Alvin Villar sea...@gmail.com wrote: HI guys, Here's an *initial* webmap showing where the jagged coastlines are as of July 3: http://forge.codedgraphic.com/osm/sawtooth_coastlines/ The larger the circle, the more jagged steps there are to clean up. Sorry, there's no link going to Potlatch or JOSM/Merkaartor. I'll add that up when I learn more of OpenLayers. But for now, this will have to do. Enjoy! Eugene On Mon, Jul 5, 2010 at 9:30 AM, maning sambale emmanuel.samb...@gmail.com wrote: We missed the June target to to finish the 10 largest islands. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities That's OK. All we need is to finish mainland Mindanao and we can set our radar to the next 20 on the list. We are also working on some webmap to visualize the sawtooth. More on that when its ready. On Sun, Jul 4, 2010 at 5:48 PM, maning sambale emmanuel.samb...@gmail.com wrote: I can load it in my public dropbox. On Sun, Jul 4, 2010 at 2:23 PM, Eugene Alvin Villar sea...@gmail.com wrote: Hi guys, Once we are done with the large islands, the next step is to do the smaller islands. Ian Haylock has helpfully provided the PGS coastlines[1] for the Philippines last year[2] which he edited to combine ways. PGS itself was automatically generated by a software by analyzing the Landsat imagery. Unfortunately, Ian's file was hosted on a free file server and has now expired but I think several people on the mailing list managed to download it. I tried opening the file last year in Merkaartor but my old laptop couldn't handle the data. Now that I have a 4GB-RAM laptop, loading the data into Merkaartor is very manageable. Using the PGS coastlines is much, much easier than tracing Landsat by hand. I tried this with Homonhon Island and editing is way faster than actually uploading it[3]. Hehehe. What I did was to delete the SRTM-derived coastline[4] and replace it with the PGS coastline[5]. I think uploading the PGS coastlines is better for the smaller islands. I'll see what we can do to have the PGS coastlines (55MB) uploaded somewhere. [1] http://wiki.openstreetmap.org/wiki/Prototype_Global_Shoreline [2] http://lists.openstreetmap.org/pipermail/talk-ph/2009-June/001071.html [3] http://www.openstreetmap.org/browse/changeset/5129873 [4] http://www.openstreetmap.org/browse/way/4327906 [5] http://www.openstreetmap.org/browse/way/65592780 Eugene On Thu, Jun 17, 2010 at 8:20 PM, maning sambale emmanuel.samb...@gmail.com wrote: UPDATE. Only two islands from the top ten need some coasty coastline love. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections Anyone working on Negros and Mainland Mindanao? -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- http://vaes9.codedgraphic.com ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- website administrator: - www.waypoints.ph - reeflife.eppgarcia.com PADI Divemaster #491048 -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list
Re: [talk-ph] better ways to coordinate coastline mapping?
Ah I get it ... So it detects node strings that form a step (a horizontal and a vertical combination). It may be good to make mappers aware that such a combination will trigger sawtooth detection by Eugene's script. For there are some coastline contours that are indeed on a step shape. Good way to avoid it is to move the nodes just a bit so the longitude/latitude pairings would not be exactly the same. I found this out on one of my Marinduque island edits. thanks! On Tue, Jul 6, 2010 at 9:31 AM, maning sambale emmanuel.samb...@gmail.comwrote: @ ed, The technique is outlined here: http://wiki.openstreetmap.org/wiki/Talk:WikiProject_Philippines/Coastline_Corrections Couple of suggestions: 1. short link to the coastline correction wikipage 2. enable link to editors only at higher zoom level (perhaps 15-17?) 3. should be an osm-ph image of the week On Tue, Jul 6, 2010 at 9:20 AM, Ed Garcia eppgar...@gmail.com wrote: Wow! amazing ... how do you detect sawtoothness? can you teach this at the skillshare? OSM genius ka talaga! Anyway, I take note of the sawtooth patterns between Lucena and Pagbilao Quezon ... I have corrected this already but the sawtooth appears only on higher zoom-out levels now. Does this mean it is good as done now? It still appears on yoursawtooth_coastlines map though. ed On Tue, Jul 6, 2010 at 1:04 AM, Eugene Alvin Villar sea...@gmail.com wrote: HI guys, Here's an *initial* webmap showing where the jagged coastlines are as of July 3: http://forge.codedgraphic.com/osm/sawtooth_coastlines/ The larger the circle, the more jagged steps there are to clean up. Sorry, there's no link going to Potlatch or JOSM/Merkaartor. I'll add that up when I learn more of OpenLayers. But for now, this will have to do. Enjoy! Eugene On Mon, Jul 5, 2010 at 9:30 AM, maning sambale emmanuel.samb...@gmail.com wrote: We missed the June target to to finish the 10 largest islands. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities That's OK. All we need is to finish mainland Mindanao and we can set our radar to the next 20 on the list. We are also working on some webmap to visualize the sawtooth. More on that when its ready. On Sun, Jul 4, 2010 at 5:48 PM, maning sambale emmanuel.samb...@gmail.com wrote: I can load it in my public dropbox. On Sun, Jul 4, 2010 at 2:23 PM, Eugene Alvin Villar sea...@gmail.com wrote: Hi guys, Once we are done with the large islands, the next step is to do the smaller islands. Ian Haylock has helpfully provided the PGS coastlines[1] for the Philippines last year[2] which he edited to combine ways. PGS itself was automatically generated by a software by analyzing the Landsat imagery. Unfortunately, Ian's file was hosted on a free file server and has now expired but I think several people on the mailing list managed to download it. I tried opening the file last year in Merkaartor but my old laptop couldn't handle the data. Now that I have a 4GB-RAM laptop, loading the data into Merkaartor is very manageable. Using the PGS coastlines is much, much easier than tracing Landsat by hand. I tried this with Homonhon Island and editing is way faster than actually uploading it[3]. Hehehe. What I did was to delete the SRTM-derived coastline[4] and replace it with the PGS coastline[5]. I think uploading the PGS coastlines is better for the smaller islands. I'll see what we can do to have the PGS coastlines (55MB) uploaded somewhere. [1] http://wiki.openstreetmap.org/wiki/Prototype_Global_Shoreline [2] http://lists.openstreetmap.org/pipermail/talk-ph/2009-June/001071.html [3] http://www.openstreetmap.org/browse/changeset/5129873 [4] http://www.openstreetmap.org/browse/way/4327906 [5] http://www.openstreetmap.org/browse/way/65592780 Eugene On Thu, Jun 17, 2010 at 8:20 PM, maning sambale emmanuel.samb...@gmail.com wrote: UPDATE. Only two islands from the top ten need some coasty coastline love. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections Anyone working on Negros and Mainland Mindanao? -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list
Re: [talk-ph] better ways to coordinate coastline mapping?
To clarify things, the sawtooth detection script is quite naive. It simply detects if there are at three or more series of nodes where each pair of adjacent nodes have the same latitude or longitude. This will also detect any three linear nodes that all have the same latitude or longitude like this: ooo (A bit silly, I know, but the middle node should probably be deleted anyway.) The idea of the webmap is to highlight where there are coastlines derived from the raster SRTM data. 99% of our coastlines were derived from SRTM and any sawtooth is an indication that this should be cleaned up to better match the actual coastline (like Landsat or PGS). It's ridiculously easy to defeat the script: just nudge nodes. But the point is not to defeat the script but to check out areas in need of correction. I would assume that anybody moving coastline nodes would do so to correct or refine the data and not simply to defeat the script, right? Right? :-D Another clarification, the webmap is still just an initial map and it doesn't currently do any updates (so maning's recent work on Mindanao's eastern coast won't be picked up yet). I'm working with maning to devise a way to have the map update on a near-daily basis by tying into his OSM-PH Garmin Maps workflow. Wait in the future for this. On Tue, Jul 6, 2010 at 10:17 AM, Ed Garcia eppgar...@gmail.com wrote: Ah I get it ... So it detects node strings that form a step (a horizontal and a vertical combination). It may be good to make mappers aware that such a combination will trigger sawtooth detection by Eugene's script. For there are some coastline contours that are indeed on a step shape. Good way to avoid it is to move the nodes just a bit so the longitude/latitude pairings would not be exactly the same. I found this out on one of my Marinduque island edits. thanks! On Tue, Jul 6, 2010 at 9:31 AM, maning sambale emmanuel.samb...@gmail.com wrote: @ ed, The technique is outlined here: http://wiki.openstreetmap.org/wiki/Talk:WikiProject_Philippines/Coastline_Corrections Couple of suggestions: 1. short link to the coastline correction wikipage 2. enable link to editors only at higher zoom level (perhaps 15-17?) 3. should be an osm-ph image of the week On Tue, Jul 6, 2010 at 9:20 AM, Ed Garcia eppgar...@gmail.com wrote: Wow! amazing ... how do you detect sawtoothness? can you teach this at the skillshare? OSM genius ka talaga! Anyway, I take note of the sawtooth patterns between Lucena and Pagbilao Quezon ... I have corrected this already but the sawtooth appears only on higher zoom-out levels now. Does this mean it is good as done now? It still appears on yoursawtooth_coastlines map though. ed On Tue, Jul 6, 2010 at 1:04 AM, Eugene Alvin Villar sea...@gmail.com wrote: HI guys, Here's an *initial* webmap showing where the jagged coastlines are as of July 3: http://forge.codedgraphic.com/osm/sawtooth_coastlines/ The larger the circle, the more jagged steps there are to clean up. Sorry, there's no link going to Potlatch or JOSM/Merkaartor. I'll add that up when I learn more of OpenLayers. But for now, this will have to do. Enjoy! Eugene On Mon, Jul 5, 2010 at 9:30 AM, maning sambale emmanuel.samb...@gmail.com wrote: We missed the June target to to finish the 10 largest islands. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities That's OK. All we need is to finish mainland Mindanao and we can set our radar to the next 20 on the list. We are also working on some webmap to visualize the sawtooth. More on that when its ready. On Sun, Jul 4, 2010 at 5:48 PM, maning sambale emmanuel.samb...@gmail.com wrote: I can load it in my public dropbox. On Sun, Jul 4, 2010 at 2:23 PM, Eugene Alvin Villar sea...@gmail.com wrote: Hi guys, Once we are done with the large islands, the next step is to do the smaller islands. Ian Haylock has helpfully provided the PGS coastlines[1] for the Philippines last year[2] which he edited to combine ways. PGS itself was automatically generated by a software by analyzing the Landsat imagery. Unfortunately, Ian's file was hosted on a free file server and has now expired but I think several people on the mailing list managed to download it. I tried opening the file last year in Merkaartor but my old laptop couldn't handle the data. Now that I have a 4GB-RAM laptop, loading the data into Merkaartor is very manageable. Using the PGS coastlines is much, much easier than tracing Landsat by hand. I tried this with Homonhon Island and editing is way faster than actually uploading it[3]. Hehehe. What I did was to delete the SRTM-derived coastline[4] and replace it with the PGS coastline[5]. I think uploading the PGS coastlines is better for the smaller islands. I'll see what we
Re: [talk-ph] better ways to coordinate coastline mapping?
Anyway, it seems that Negros is actually the cleanest large island in terms of coastlines. :-) On Tue, Jul 6, 2010 at 11:57 AM, Eugene Alvin Villar sea...@gmail.comwrote: To clarify things, the sawtooth detection script is quite naive. It simply detects if there are at three or more series of nodes where each pair of adjacent nodes have the same latitude or longitude. This will also detect any three linear nodes that all have the same latitude or longitude like this: ooo (A bit silly, I know, but the middle node should probably be deleted anyway.) The idea of the webmap is to highlight where there are coastlines derived from the raster SRTM data. 99% of our coastlines were derived from SRTM and any sawtooth is an indication that this should be cleaned up to better match the actual coastline (like Landsat or PGS). It's ridiculously easy to defeat the script: just nudge nodes. But the point is not to defeat the script but to check out areas in need of correction. I would assume that anybody moving coastline nodes would do so to correct or refine the data and not simply to defeat the script, right? Right? :-D Another clarification, the webmap is still just an initial map and it doesn't currently do any updates (so maning's recent work on Mindanao's eastern coast won't be picked up yet). I'm working with maning to devise a way to have the map update on a near-daily basis by tying into his OSM-PH Garmin Maps workflow. Wait in the future for this. On Tue, Jul 6, 2010 at 10:17 AM, Ed Garcia eppgar...@gmail.com wrote: Ah I get it ... So it detects node strings that form a step (a horizontal and a vertical combination). It may be good to make mappers aware that such a combination will trigger sawtooth detection by Eugene's script. For there are some coastline contours that are indeed on a step shape. Good way to avoid it is to move the nodes just a bit so the longitude/latitude pairings would not be exactly the same. I found this out on one of my Marinduque island edits. thanks! On Tue, Jul 6, 2010 at 9:31 AM, maning sambale emmanuel.samb...@gmail.com wrote: @ ed, The technique is outlined here: http://wiki.openstreetmap.org/wiki/Talk:WikiProject_Philippines/Coastline_Corrections Couple of suggestions: 1. short link to the coastline correction wikipage 2. enable link to editors only at higher zoom level (perhaps 15-17?) 3. should be an osm-ph image of the week On Tue, Jul 6, 2010 at 9:20 AM, Ed Garcia eppgar...@gmail.com wrote: Wow! amazing ... how do you detect sawtoothness? can you teach this at the skillshare? OSM genius ka talaga! Anyway, I take note of the sawtooth patterns between Lucena and Pagbilao Quezon ... I have corrected this already but the sawtooth appears only on higher zoom-out levels now. Does this mean it is good as done now? It still appears on yoursawtooth_coastlines map though. ed On Tue, Jul 6, 2010 at 1:04 AM, Eugene Alvin Villar sea...@gmail.com wrote: HI guys, Here's an *initial* webmap showing where the jagged coastlines are as of July 3: http://forge.codedgraphic.com/osm/sawtooth_coastlines/ The larger the circle, the more jagged steps there are to clean up. Sorry, there's no link going to Potlatch or JOSM/Merkaartor. I'll add that up when I learn more of OpenLayers. But for now, this will have to do. Enjoy! Eugene On Mon, Jul 5, 2010 at 9:30 AM, maning sambale emmanuel.samb...@gmail.com wrote: We missed the June target to to finish the 10 largest islands. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities That's OK. All we need is to finish mainland Mindanao and we can set our radar to the next 20 on the list. We are also working on some webmap to visualize the sawtooth. More on that when its ready. On Sun, Jul 4, 2010 at 5:48 PM, maning sambale emmanuel.samb...@gmail.com wrote: I can load it in my public dropbox. On Sun, Jul 4, 2010 at 2:23 PM, Eugene Alvin Villar sea...@gmail.com wrote: Hi guys, Once we are done with the large islands, the next step is to do the smaller islands. Ian Haylock has helpfully provided the PGS coastlines[1] for the Philippines last year[2] which he edited to combine ways. PGS itself was automatically generated by a software by analyzing the Landsat imagery. Unfortunately, Ian's file was hosted on a free file server and has now expired but I think several people on the mailing list managed to download it. I tried opening the file last year in Merkaartor but my old laptop couldn't handle the data. Now that I have a 4GB-RAM laptop, loading the data into Merkaartor is very manageable. Using the PGS coastlines is much, much easier than tracing Landsat by hand. I tried this with Homonhon Island and editing is way faster than actually uploading it[3]. Hehehe. What
Re: [talk-ph] better ways to coordinate coastline mapping?
Just to add, not everything sawtoothed is wrong, I've seen piers and reclamation areas with a similar geometry. The sawtooth webmap simply shows you areas of improvement. On Tue, Jul 6, 2010 at 11:57 AM, Eugene Alvin Villar sea...@gmail.com wrote: I'm working with maning to devise a way to have the map update on a near-daily basis by tying into his OSM-PH Garmin Maps workflow. Wait in the future for this. Working on it. PS. we need more debug tools specific to the Philippines -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
