Article: 2548 of sci.geo.satellite-nav Message-ID: <3BEBF10F.C28B494C@alphalink.com.au> Date: Sat, 10 Nov 2001 02:06:55 +1100 From: Graham X-Mailer: Mozilla 4.73 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 Newsgroups: sci.geo.satellite-nav Subject: Re: Conversion of GPS coordinates into decimal etc. References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit NNTP-Posting-Host: d05-ds0-mel.alphalink.com.au X-Original-NNTP-Posting-Host: d05-ds0-mel.alphalink.com.au X-Trace: news.alphalink.com.au 1005318414 d05-ds0-mel.alphalink.com.au (10 Nov 2001 02:06:54 +1000) Organization: Client of Alphalink Australia Pty. Ltd. Lines: 55 X-Complaints-To: news-complaints@alphalink.com.au X-No-Archive: Yes Path: news.meer.net!sea-read.news.verio.net!dfw-artgen.news.verio.net!dfw-peer.news.verio.net!news.verio.net!newspump.sol.net!newsfeed.direct.ca!look.ca!newshub2.rdc1.sfba.home.com!news.home.com!enews.sgi.com!harbinger.cc.monash.edu.au!news.mel.connect.com.au!news.alphalink.com.au!news.alphalink.com.au Xref: archive.mv.meer.net sci.geo.satellite-nav:2548 60 minutes = 1 degree. Rob James wrote: > Here is a newbie's very basic question, but I can't find out how to > convert my GPS coordinates into decimal notation so that they can be > entered into mapping software. 30 minutes = 30/60 x 1 degree = 0.5 degree 58.119 minutes = 58.119/60 x 1 degree 0.5 degrees = 0.5 x 60 minutes = 30 minutes 0.6348 degrees = 0.6348 x 60 minutes S 40 57.945' E 175 01.126' S 40 58.119' E 175 02.030' S 40 58.313' E 175 02.808' S 40 58.185' E 175 02.242' S 40 57.534' E 175.02.011' S 40 57.747' E 175 01.518' S 40 57.944' E 175 01.126' Decimal minutes for the above coordinates: 0.96575 0.018767 0.96865 0.033833 0.971883 0.0468 0.96975 0.037367 0.9589 0.033517 0.96245 0.0253 0.965733 0.018767 > I want to enter these coordinates into the simple > mapping program at: > > http://crusty.er.usgs.gov/mapit/ The USCG coastline extractor used to live on crusty too, but has moved to: http://rimmer.ngdc.noaa.gov/coast/getcoast.html You might notice the rather familiar user interface. Boating people can download coastline profiles and use Oziexplorer to upload them as trackplots to non-mapping GPS. > Does anyone have any advice about a good free mapping program for doing > basic maps of forest tracks? Ozi Explorer is one of the best of the many scanned map programs. The unregistered version has sufficient limitations to encourage people to pay for registration, yet is certainly very useful software in it's own right. The major limitation of the unregistered version is that it only allows the use of two calibration points for a map. Provided that north on the map is accurately aligned with up on the screen this is not a problem. If you only want to map your track plots, then you don't even need to calibrate a map, you just use the blank map feature.