Maps, navigation & GPS workshop, May 29

Table of Contents
Pre-trek – explore topology of new mountain ranges and identify candidate trails
Basics of topology
Google Maps – Terrain View (topology)
http://maps.google.com
Google Maps – Satellite View & Google Earth (topology and vegetation density), 3D views
http://earth.google.com/
overlay maps – elevation contours, position
Wikimapia – identify additional landmarks
http://wikimapia.org/
Survey of India topographic maps, scale 1:25K, 1:50K
http://www.surveyofindia.gov.in/
identifying villages, trails, streams, lakes
AMS (Army Map Service) topographic maps, scale 1:250K (1954)
http://www.lib.utexas.edu/maps/ams/india/
Russion topographic maps, scale 1:200K
http://maps.poehali.org/en/

GPS explained
http://gpsinformation.org/penrod/VistaHcx/vistahcx.html
Satellite lock, position, accuracy
Maps – road and topographic
Routing
Electronic compass
Altimeter
Logging tracks, waypoints
Elevation profile
Sun & moon
GPX – universional exchange format

Field navigation
Downloading Google Map waypoints and trails in GPS
Convert GM to KMZ – http://www.elsewhere.org/journal/gmaptogpx/
Convert KMZ to GPX – http://www.gpsvisualizer.com
Stiching Google Maps and overlaying GPS grid
Example – http://sachennaitrekkingclub.googlegroups.com/web/N10.xls?gda=aYGbFzsAAAB39s5-dkfP-WUDczlxTdNZ0uTfAxs0CwbXR6wg5IjqYy-4trbyHuUgdo5gc4usQyk6gzhYSadRTH0PskjdO-jk&gsc=pnTp2BYAAAAapU583yUuprG7IEHARDBf-vghgYgES8zAzJdW7J9-8w

Post trek
Download GPS trails in Google Maps/Earth for post-trek review
http://www.gpsvisualizer.com
Geotagging photographs
http://groups.google.co.in/group/sachennaitrekkingclub/web/geo-tagging-you-trek-photographs
http://picasaweb.google.com/iamvivekyadav/OmbattuGudde2Nov08#

Original recordings (highest quality) are available over here. Total size is around 1GB –
These files can be played back with CamStudio
YouTube videos (lower quality) are available here –
Watch the 14 videos in 720HD on a good broadband connection.
Link to presentation

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