A simple formula for calculating distance by latitude degree is to take the
cosine of the latitude, and multiply it by 69.0933
ie - cos(10 degrees)*69.0933 = 68.04362
Berk Charlton
Geographic Marketing Solutions
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of David F Forsythe
> Sent: Monday, May 15, 2000 2:27 PM
> To: Dick Hoskins
> Cc: [EMAIL PROTECTED]
> Subject: Re: MI Formular for long/lat
>
>
> One degree of latitude is always approximately 69.0933 miles.
> This table shows the approximate distance (in miles) of one degree
> of longitude at each degree of Latitude
>
> Latitude Distance of
> one Longitude
> degree
>
> 0 69.0933
> 1 69.0828
> 2 69.0512
> 3 68.9986
> 4 68.925
> 5 68.8304
> 6 68.7148
> 7 68.5783
> 8 68.4209
> 9 68.2426
> 10 68.0436
> 11 67.8238
> 12 67.5834
> 13 67.3224
> 14 67.0409
> 15 66.7389
> 16 66.4167
> 17 66.0742
> 18 65.7115
> 19 65.3289
> 20 64.9264
> 21 64.504
> 22 64.0621
> 23 63.6006
> 24 63.1197
> 25 62.6196
> 26 62.1005
> 27 61.5624
> 28 61.0056
> 29 60.4302
> 30 59.8364
> 31 59.2243
> 32 58.5942
> 33 57.9463
> 34 57.2807
> 35 56.5977
> 36 55.8974
> 37 55.1801
> 38 54.446
> 39 53.6953
> 40 52.9283
> 41 52.1451
> 42 51.346
> 43 50.5313
> 44 49.7013
> 45 48.856
> 46 47.9959
> 47 47.1212
> 48 46.2321
> 49 45.329
> 50 44.412
> 51 43.4815
> 52 42.5377
> 53 41.581
> 54 40.6117
> 55 39.6299
> 56 38.6361
> 57 37.6306
> 58 36.6135
> 59 35.5853
> 60 34.5463
> 61 33.4968
> 62 32.437
> 63 31.3674
> 64 30.2882
> 65 29.1998
> 66 28.1025
> 67 26.9966
> 68 25.8825
> 69 24.7605
> 70 23.631
> 71 22.4943
> 72 21.3508
> 73 20.2007
> 74 19.0445
> 75 17.8824
> 76 16.715
> 77 15.5424
> 78 14.3651
> 79 13.1835
> 80 11.9978
> 81 10.8084
> 82 9.61581
> 83 8.42025
> 84 7.22212
> 85 6.0218
> 86 4.81964
> 87 3.61602
> 88 2.41129
> 89 1.20583
> 90 0
>
>
> Dick Hoskins wrote:
>
> > I need a for formula that gives what an increment of 1 degree or 1 second
> > or 1 minute (or any other value) of long and lat is in terms of ground
> > distance as a function of long and lat. A rule of thumb-type table or
> > conversion would be OK.
> >
> > Dick Hoskins
> > [EMAIL PROTECTED]
> >
> > GIS uses in public health summer course:
> > http://healthlinks.washington.edu/inpho/gis/course.html
> > ----- Original Message -----
> > From: "Tom Brockenbrough" <[EMAIL PROTECTED]>
> > Cc: <[EMAIL PROTECTED]>
> > Sent: Monday, May 15, 2000 9:35 AM
> > Subject: Re: MI Specifying scale of layout
> >
> > > Not sure if this will work because I have not had the need to do so but
> > can
> > > you go under Map> Options>, change distance units to inches, and then
> > change
> > > your Map Scale and Layout Scale to obtain what you need?
> > >
> > > Hope it works.
> > >
> > > "SenGupta,Georges" wrote:
> > >
> > > > I need to print off maps from MI at a defined scale. I have not managed
> > to
> > > > get the Map->Change View->Map Scale and the Layout->Frame Object->Scale
> > On
> > > > Paper options to work together to give me (for example) 1:2500.
> > > >
> > > > Is there an obvious way that I have missed?
> > > >
> > > > Thanks for your help. Will sum responses.
> > > > ----------------------------------------------------------------------
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> > >
> >
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>
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