GRIDS and Graticule

[Brent Fraser]

François,

  Here's the documentation explanation, along with some of my notes on the
parameters:

MINARCS [double]
The minimum number of arcs to draw.
The minimum number of graticule lines to draw on the map.  Use this
parameter to get more lines.

MAXARCS [double]
The maximum number of arcs to draw.
The maximum number of graticule lines to draw on the map.  Use this
parameter to get fewer lines.


MININTERVAL [double]
The minimum number of intervals to try to use. The distance between the
lines, in map units.

MAXINTERVAL [double]
The maximum number of intervals to try to use.  The distance between the
lines, in map units.


MINSUBDIVIDE [double]
The minimum number of segments to use when rendering an arc.   If the lines
should be very curved, increase this number to smooth the lines.

MAXSUBDIVIDE [double]
The maximum number of segments to use when rendering an arc.   If the
graticule should be very straight, use a small number to minimize the number
of points for faster rendering.


Brent Fraser


----- Original Message ----- 
From: "François TOURDE" <fr-ms at TOURDE.ORG>
To: <MAPSERVER-USERS at LISTS.UMN.EDU>
Sent: Monday, June 27, 2005 9:27 AM
Subject: [UMN_MAPSERVER-USERS] GRIDS and Graticule


> Hi,
>
> I don't undestand clearly what is the exact signification of these
> GRID parameters.
>
> #      MINARCS 4
>       MAXARCS 10
>       MININTERVAL 1
>       MAXINTERVAL 15
> #      MINSUBDIVIDE 1
>       MAXSUBDIVIDE 2
>
>
> Could somebody explain me what's an ARC, what's a Subdivide, and,
> cerise sur le gateau, how MAPSERVER (or me) choose the best interval
> for displaying Graticule?
>
> Many Thanks