Selecting a good SQL Server 2008 spatial index with large polygons

Question

I\'m having some fun trying to pick a decent SQL Server 2008 spatial index setup for a data set I am dealing with.

The dataset is polygons, representing contours ove

Answer 1

In your index query you use:

CREATE SPATIAL INDEX [contasplit_sidx] ON [dbo].[ContASplit] 
(
    [geom]
)USING  GEOMETRY_GRID 
WITH (
BOUNDING_BOX =(-90, -180, 90, 180),
...

The BOUNDING_BOX therefore maps to:

xmin = -90
ymin = -180
xmax = 90
ymax = 180

• Longtitude (-180 to 180 - designating East / West of the Meridian) should map to X
• Latitude (-90 to 90 - designating how far North or South of the Equator) should map to Y

So to create the BOUNDING_BOX for the world you should use:

CREATE SPATIAL INDEX [contasplit_sidx] ON [dbo].[ContASplit] 
(
    [geom]
)USING  GEOMETRY_GRID 
WITH (
BOUNDING_BOX =(-180, -90, 180, 90),
...

This should create an index that fits your data and means all your features are covered by the index.