Hinge Thunder Posted April 30, 2002 Posted April 30, 2002 I have a Map 330, and have Mapsend Topo. I thought the Topo would be useful to avoid problems I have had while caching where I end up on the wrond side of a chasm. I brought up one of the places where I previously got stuck (here it is on topozone): http://www.topozone.com/map.asp?u=1&lat=42.66813&mapit=Map+It&lon=-77.33477&size=s&s=25 Where topozone shows a huge deep gully, Mapsend shows a smooth hill, with a blue line for a creek. Is there a setting to turn the detail up? Quote
jfitzpat Posted April 30, 2002 Posted April 30, 2002 A USGS 'quad' is generally 1:24000. The Garmin and Magellan downloadable maps are generally 1:100000 (less than 1/4 the detail). The detail is pretty disappointing. That said, a USGS quad can still leave you in a lurch. 30' cliffs are sometimes invisible with 40' elevation lines... -jjf Quote
jfitzpat Posted April 30, 2002 Posted April 30, 2002 A USGS 'quad' is generally 1:24000. The Garmin and Magellan downloadable maps are generally 1:100000 (less than 1/4 the detail). The detail is pretty disappointing. That said, a USGS quad can still leave you in a lurch. 30' cliffs are sometimes invisible with 40' elevation lines... -jjf Quote
+Alan2 Posted April 30, 2002 Posted April 30, 2002 quote:Originally posted by jfitzpat: A USGS 'quad' is generally 1:24000. The Garmin and Magellan downloadable maps are generally 1:100000 (less than 1/4 the detail). -jjf Wouldn't the detail be closer to the square of 4 or 16 times since we're talking about area? All I know is that my NG Topo for the Northeast uses 10 CD's. Allowing a few of those for 100000 and other scales, tha leaves a lot of storage for quads. Mapsource Topo uses only 3 CD's for all 50 states. Alan Quote
+Alan2 Posted April 30, 2002 Posted April 30, 2002 quote:Originally posted by jfitzpat: A USGS 'quad' is generally 1:24000. The Garmin and Magellan downloadable maps are generally 1:100000 (less than 1/4 the detail). -jjf Wouldn't the detail be closer to the square of 4 or 16 times since we're talking about area? All I know is that my NG Topo for the Northeast uses 10 CD's. Allowing a few of those for 100000 and other scales, tha leaves a lot of storage for quads. Mapsource Topo uses only 3 CD's for all 50 states. Alan Quote
jfitzpat Posted May 1, 2002 Posted May 1, 2002 quote:Originally posted by Alan2: Wouldn't the detail be closer to the square of 4 or 16 times since we're talking about area? All I know is that my NG Topo for the Northeast uses 10 CD's. Allowing a few of those for 100000 and other scales, tha leaves a lot of storage for quads. Mapsource Topo uses only 3 CD's for all 50 states. Alan I don't have as much experience with the Magellan topos, but the MapSource CDs seem to contain more detail around some areas (IE, the elevation lines are not consistantly spaced). But, what I meant was that, at best, you have 1/4 the detail. In some spots, it seems much, much worse than even the old printed 1:100000 maps. -jjf Quote
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