On Wed, Jun 25, 2008 at 1:39 PM, Pradeepto Bhattacharya
Since many people on this list have attended workshops or
even done some mapping/tracing work, I thought I would ask some
questions here -
1) Suppose you are walking on a particular street - 2 way
street even - you encounter a few shops - say a big Sweet and Snacks /
Hotel / School / anything, on the same street. Now how do you put
those on the maps while GPS tracking and then tracing the map on the
Mark what you want as waypoints .so its always a good decision to
carry a notepad and a pen while mapping.
I mean, the to reach the shop, you have to walk good 5
meters or such - at times - depending on width of foot path or such.
Now those paths are not roads really, and they can vary from place to
place. How to tackle such offsets ?
Offsets can only be tackle when you are
actually editing the track for
maps . JOSM , potlaych , mapnik all provide presets for this .again
pen and paper comes to help .
2) Suppose you have tracked certain part of your town or
your route from your home to airport near your city. Then you fly to
another city and then restart the GPS device. At that point the device
generally has to re-initiate itself to capture/detect the satellites (
which it has to do anyway incase you turn off and then switch on a gps
device - atleast in some devices that I have seen ). Anyway after it
has done that, it calculates the Longitude and Latitude and hence the
current position. What happens in this case is, the GPS device draws a
straight line from City A to City B. Is there a way to avoid that /
tackle that ?
well just dont put that part while editing the tracks/routes . its
always better to mark waypoints of imporatnt cities in between routes
. atleast thats what i did from delhi to kolkata and off course take
help of yahoo maps as the collaborate with OSM with thsi regard . more
details can be found at osm-talk list
Any pointers ? Thanks in advance.
West Bengal , India
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Server : pgp.mit.edu