Groundtruth (contour) runs on my mapsource. I initially loaded 6 tiles (from east to west -- Quezon sierra madre, Rizal to Batangas, NCR to Bataan) on my 76CSx, together with the latest osmph_garmin. They show on top of each other (transparent). Didn't crash on my garmin.
However, with the low-res screen of 76CSx (Details set to Normal), the contours on the mountain portion is only usable (readable) at zoomscale 2km & below. At 3km above, the 100m contour lines tends to clutter the mountainous portion of the map (fortunately there aren't many roads & POI's there). Redraw speed was ok. I didn't notice any problem (on normal street-level zoom), but I'm doing only around 30kmh, coz i'm also collecting tracks at that time. But on 'over zoom mode' (12-20meters scale), redraw speed slows down a bit, but still acceptable (while driving); Although this will not be an issue at walking-pace of mountain-hiking gps users. I don't know what will happen if I load the entire groundtruth map (around 180mb) together with osmphgarmin map. let's see later if my unit will crash :-) Accuracy Test: 76CSx with External Antenna on top of car (roughly 1-1/2 meter above ground) GPS signal availability & strength was very good (EPE alternating between 2 to 4 meters) On initial test on Antipolo Hills this morning (an area above 120meters elevation), I parked my car exactly on top of a few 10m-contour lines that I crossed along the road, and compared their Elevations with the readings of Barometric Sensor Elevation of 76CSx. Not bad !!! (there's only 3-5 meters difference, sometimes exactly the same like on the 10meter contour lines). Well, considering other factors like height/location of antenna on top of my car & low EPE of gps, initial test says we can possibly navigate in zero-visibility mountain area (using STRM 10meter contour data) with lesser chance of falling of a cliff. I wish other people can test this (STRM data) map on other higher areas to verify my findings (if high-accuracy is same on other places). On Wed, Jul 28, 2010 at 8:31 PM, maning sambale <emmanuel.samb...@gmail.com> wrote: > Anyone interested to test this? > > 10m contour interval for Garmin devices. Download the link below (~200 MB): > http://dl.dropbox.com/u/607635/osm-ph_gps_maps/10mcontour_ph_winmapsource_latest.exe > > The contour were generated from SRTM data using Groundtruth. The data > was divided into 0.75 grid tile. > > Beware: Loading the full Philippine map crashed my device! Please > test if this works for your own device. > I am interested in the following scenarios: > 1. If you only add a limited number of contour tiles, does it crash your > unit? > 2. If you add only the contour and not the osm-ph map, does it crash as well? > 3. At what zoom level does it crash (watch the map scale)? > > Enjoy! > > > > On Tue, Jul 27, 2010 at 11:41 AM, maning sambale > <emmanuel.samb...@gmail.com> wrote: >> Last time I checked, groudtruth uses the cgpsmapper to compile garmin >> maps. The free cgpsmapper has a lot of limitations (i.e. limited >> routing), unless you but the pro version. However, I used groundtruth >> to generate contour maps based on SRTM. I intend to provide free >> download soon. If anyone wants them for testing, let me know. My >> unit crashed when I loaded the whole country's 10m elevation contour! >> >> On Tue, Jul 27, 2010 at 12:47 AM, Eugene Alvin Villar <sea...@gmail.com> >> wrote: >>> Here's the original blog post (Dec. '08) by Ground Truth's creator about the >>> difference between his tool and the popular mkgmap tool, which maning uses >>> to create the OSM-PH Garmin maps. >>> >>> http://igorbrejc.net/openstreetmap/groundtruth-a-new-garmin-mapmaking-tool >>> >>> Take note that the post is back in 2008. Things probably changed a lot since >>> then. >>> >>> >>> On Mon, Jul 26, 2010 at 7:59 PM, Jim Morgan <j...@datalude.com> wrote: >>>> >>>> Just found this tool for making Garmin images from OSM data >>>> >>>> GroundTruth v1.0.0.0 by Igor Brejc >>>> Generates Garmin maps from OpenStreetMap data >>>> Visit http://wiki.openstreetmap.org/wiki/GroundTruth for more info >>>> >>>> Also a helpful step-by-step guide. >>>> >>>> http://wiki.openstreetmap.org/wiki/GroundTruth_For_Dummies >>>> >>>> I don't have a Garmin. But I thought it might be useful. Looks quite >>>> customisable as well. You can make eg a hiking map using a different set of >>>> rules. >>>> >>>> groundtruth makemap >>>> -rules="http://wiki.openstreetmap.org/wiki/GroundTruth_Hiking_Map" >>>> >>>> Jim >>>> >>>> -- >>>> datalude: information security >>>> e: j...@datalude.com >>>> Philippines: +63 2 403 1311 / mob: +63 920 912 5830 >>>> Hong Kong: +852 6840 6693 >>>> w: http://www.datalude.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 >>> >>> >> >> >> >> -- >> 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 > _______________________________________________ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph