[talk-ph] request for testing 10m contour for garmin (was Re: Groundtruth.)

Fri Jul 30 13:58:52 BST 2010

Thanks for the report rally.  Just to add our conversations vie chat.

"whole groudtruth together with osmph loaded successfully to 76csx.
but is crawling on redraw at 200km scale even at 800km... it still
redraws. but we all know that contour is useless at greater than 5km
scale. "

I guess the problem is with the nuvi (my diagnostic log reported an
"out of memory" error).

On Fri, Jul 30, 2010 at 2:18 PM, Rally de Leon <ralleon at gmail.com> wrote:
> 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.sambale at 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.sambale at 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 <seav80 at 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 <jim at 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: jim at 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 at openstreetmap.org
>>>>> http://lists.openstreetmap.org/listinfo/talk-ph
>>>>
>>>>
>>>>
>>>> --
>>>> http://vaes9.codedgraphic.com
>>>>
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>>>>
>>>
>>>
>>>
>>> --
>>> 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/
>> ------------------------------------------------------
>>
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>

-- 
cheers,
maning
------------------------------------------------------
"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
------------------------------------------------------