Dear Boudewijn
Many thanks for your scientific explaination.
Best regards,
Dr. M.M.Shendi
>From: Boudewijn van Leeuwen <[EMAIL PROTECTED]>
>Reply-To: "Ilwis-List" <[EMAIL PROTECTED]>
>To: Ilwis list <[EMAIL PROTECTED]>
>Subject: (ilwis-list) Polygons not shown in map/not printed
>Date: Mon, 7 May 2001 13:14:43 +0200
>
>Dear ILWIS-List members,
>
>ILWIS uses the Windows function "Polygon" to draw polygons on the
>screen. This function has the following limitation.
>
>From the MicroSoft documentation (MSDN):
>
>
>"The Polygon function draws a polygon consisting of two or more vertices
>connected by straight lines. The polygon is outlined by using the
>current pen and filled by using the current brush and polygon fill mode.
>
>Remarks:
>Windows 95/98/Me: Polygon is limited in the number of points it can
>draw, depending on the line width, as shown in the following table.
>Line width Maximum
>number of points
>line width is 1
>16K
>line width > 1 (that is, wideline) and device supports wideline
>16K
>line width > 1 but the device does not support wideline
>approximately 1360 (that is, a few less than 16K / 12"
>
>
>
>In order words, when you are using Windows 95/98/Me a polygon that has a
>standard line width may contain a maximum of 16000 points.
>In ILWIS 3.0, When you are running Windows 2000 or NT, the maximum
>number of points will be 64000.
>
>
>
>Best regards,
>
>B. (Boudewijn) van Leeuwen M.Sc.
>Software Tester
>IT Department, Sector Remote Sensing & GIS
>International Institute for Aerospace Survey and Earth Sciences (ITC)
>P.O. Box 6, 7500 AA Enschede, The Netherlands
>Telefax +31 (0)53 4874 335
>Internet http://www.itc.nl
>
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