Hi Gordon,
You're almost there, but I'd transform the closed regions created in
Gridmaker (with 100m spacing) into points using a bit of mapbasic code
in the Mapbasic window:
1. Open your closed region grid table into a map window
2. Open the mapbasic window (Options > Show MapBasic window)
3. Make sure Mapinfo works in the same coordinate system as your table
by typing the following text into the MapBasic window on a blank line
and pressing return (replace YourTableName with the name of the grid
table): set coordsys table YourTableName
4. Replace each region with a point, offset from its centre by 100m in
the x and y directions by typing the following text into the MapBasic
window on a blank line and pressing return (replace YourTableName with
the name of the grid table): update YourTableName set obj =
createpoint(centroidx(obj)-100,centroidy(obj)-100)
5. Save the table - it should now show points at the 100m grid
intersections.
Andrew
Barker, Gordon wrote:
Hi
I am trying to create a grid with single points appearing at each of the
intersections of the horizontal and vertical lines. All attempts that
have come to mind so far have not worked correctly. Can anyone please
help?
Desired result:
Single points appearing at 100m spacing related to British Grid 6 figure
grid references, (point would need to be at xxx,x00 m E, xxx,x00 m N)
Approaches already tried:
Gridmaker, Closed Regions (custom line style of single point at start)-
start point does not appear at corner but partly up side of square
Gridmaker, Straight Polylines followed by Enclose on lines (style as
above)- Enclose mostly creates squares in a switchback sequence (N on
first column, S on 2nd etc)leaving points only appearing on every 2nd
column
Approaches not tried:
Polyline split of every vertical with every horizontal line and vice
versa- 12x10km so too large by hand and don't have tool to automate
Thank you
Gordon
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Andy Harfoot
GeoData Institute
University of Southampton
Southampton
SO17 1BJ
Tel: +44 (0)23 8059 2719
Fax: +44 (0)23 8059 2849
www.geodata.soton.ac.uk
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