OpenStreetMap
relationship of locations between Mapsource and OSM
Pleatst troch Rogerdodger op 30 july 2010 yn it English.I'm still trying to understand how to place nodes/waypoints in rural areas with no help other than coordinates. Ive now figured out how to get the coordinates from a node in mapsource,(Mapsource is the program that came with my Garmin for uploading and manipulating the data.) but when I enter those in JOSM they are way off. For example my waypoint in Mapsource is at N32 15.888 E77 11.271 I enter that in JOSM and I'm miles away. If I manually place the node in JOSM at the approximate position it tells me I'm at 32.26343 77.18796 No where near the Mapsource coordinates. Any explanations or help? ow is this something to do with the decimal point?
Discussion
Reäksje fan lyx op 30 july 2010 om 16.49 oere
The Coordinates that you get from MapSource are in Degrees, Minutes and fractions of minutes while JOSM has Degrees and fractions of degrees here. I'm not suree if you can switch JOSM to use the same system as MapSource; if not, you have to recalculate the coords yourself: One degree is 60 Minutes, so (Minutes / 60) * 100 gives you fractional degrees. Looking at 32°15.888', 15.888/60*100 gives you 26.48, so you have 32.2648 as longitude.
Reäksje fan ae6mb op 30 july 2010 om 18.34 oere
lyx is right on. I also have a slight simplification to add: You needn't multiply by 100. If you do Minutes/60 and add that to degrees, it will get you the same answer. In other words, Minutes/60=0.2648, so add that to 32 to get 32+0.2648=32.2648.
Reäksje fan h4ck3rm1k3 op 30 july 2010 om 21.52 oere
Hi,
you can convert the coords using proj/cs2cs and some perl scripts....
do you have any datafiles? post them somewhere, archive.org is good.
mike
Reäksje fan Vclaw op 31 july 2010 om 00.12 oere
Or an easier option:
Load your waypoints in MapSource, then do "Save as", and save as GPX format.
You can then open the GPX file in JOSM, and it will show markers where your waypoints are. So you can add nodes on top of the markers, and upload to OSM.
Reäksje fan Rogerdodger op 31 july 2010 om 03.16 oere
You guys are great thanks so much. lyx and ae6mb thanks for solving the degrees and minutes. Vclaw yup there's the real simple way! I duno what happened yesterday but I couldnt get the waypoint to save as GPX format. Just tried it and now it works perfect.
Reäksje fan Speedophile op 4 augustus 2010 om 14.21 oere
Another useful resource for converting between the various formats is at http://www.csgnetwork.com/gpscoordconv.html