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*Subject*: Re: 6-1-75-6 W5M --> LOCAL GRID*From*: Martin Trobec <trobecgeologygroup(at)home.com>*Date*: Tue, 27 Mar 2001 21:10:52 GMT*Newsgroups*: comp.lang.idl-pvwave*Organization*: @Home Network*References*: <99mg2e$t7u$1@news3.cadvision.com>*Xref*: news.doit.wisc.edu comp.lang.idl-pvwave:24181

Hi Mark You can convert well uwi to utm (northing-metres, easting-metres) using D. W. Lepard and K. N. Nairn TOWNSHIP UTILITIES program (1996) available at the University of Calgary bookstore for about $20. The program will output utm coordinates from a input Canadian uwi well list, or output utm coordinates from a input lat/long list for all the western Canadian provinces (including the BC land system). The default projection is NAD27 but you have a few other choices. Once you have the utm well file you can use IDL to calculate distances from point to point (like your euclid example calculation). Lepard's program will also create a vector file to plot section and township maps for overlaying your utm well locations (NAD27 projection). If you purchased ENVI with your IDL program, you can use ENVI to convert the map to about 38 different projections. Martin Trobec Mark Chan wrote: > > GIVEN: > Point A @ 6-1-75-6 W5M (Take this to be the origin. Some where in Canada). > Point B @ 1-1-75-6 W5M > Point C @ 16-1-75-6 W5M > > QUESTIONS TO BE ANSWERED: > What is the distance between A and B? > Ans: B is 5 miles east of A. > > What is the distance between A and C? > Ans: sqrt(5^2+5^2). C is NE of A. > > Etc. calculation like these. > > QUESTION FOR IDL EXPERTS: > Is there a public domain IDL routine to do the conversion between the land > system above to local coordinate? > > Thanks in advance, > Mark Chan

**References**:**6-1-75-6 W5M --> LOCAL GRID***From:*Mark Chan

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