Caliper does give you the option to pick the units for the grid spacing; instead of using the default of Long/Lat Degrees select a different coordinate system by toggling the radio button below the one labeled "Use Long/Lat Coord". Then select a new coordinate system, UTM or State Plane seem to work best, and from there you can pick meters, feet, miles, etc.. For the most control over the grid placement, select "Enter the orgin, grid spacing and number of cells" under Method.
Viktor Keenan de la Hoz - Senior GIS Technician
City of Phoenix - Street Transportation Department
Design and Construction Management Division
| Aniruddha Banerjee <[EMAIL PROTECTED]>
02/23/2005 01:24 PM
|
To: [email protected] cc: Subject: Re: [Maptitude] Re: grid |
Thanks for the tip. I use y degrees for x miles to the map center
(second option). But it would help if Caliper had a miles apart
option. Regards,
On Tue, 22 Feb 2005 16:40:28 -0000, bjs_market_research
<[EMAIL PROTECTED]> wrote:
>
> Simplest way I have found is to measure the size of the window and
> then "Cover the map with a set number of cells" using the distance.
> F'Rinstance if the map is 100 miles wide and I want a 5 mile grid I
> would enter 20 for the number of cell in the X direction. Not exact,
> but close enough for my purpose.
>
> Not sure if this answers your second question, but you can clip the
> grid by the polygons. If the grid size is small relative to the area
> of the polygon, the edges will be fairly clean.
>
> Tom
>
>
> --- In [email protected], Aniruddha Banerjee
>
> <[EMAIL PROTECTED]> wrote:
> > Is there any way (GISDK or otherwise) to create a grid layer that
> can
> > be defined by distance? (e.g. 5mile square grid). Even better, does
> > anyone know how to create regular grids based on polygons? Regards,
> > Rudy B.
> > Berkeley, CA
>
>
>
>
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--
Aniruddha Banerjee, Ph.D.
Associate Research Scientist
Prevention Research Center
1995 University Ave, Ste 450
Berkeley, CA 94706
510.883.5740
fax 510.644.0594
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