Bruce Rindahl wrote:
Your parameter r is in map units. For your example r = 1 or a 1 degree
circle. The center section should be :
buffer(GeomFromText('Point(0.0 0.0)', 4326), 1)
Now you have a circle (polygon actually) with a radius of 1 unit
(degrees) centered at point 0,0.
Next you need to scale the circle to create an ellipse. You do this
with the scale factors a and b. These parameters are dimensionless
(ratios).
>...
Ratios! I get it now. Thanks! My SELECT now works as I expected it to.
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