DATA_NOT_AVAILABLE from getElevationAlongPath()

[JavaJive]

I have tried to use the getElevationAlongPath() service and always get
the message DATA_NOT_AVAILABLE for a selection of locations within the
UK. An example of the parameters being sent is:
( [(51.30788524946315, -1.2453503646277357),(51.41985011272115,
-0.9406086444543159)], 1023 )

Am I doing something wrong, or does this service only cover the US?

PS: Please fix Google Groups broken colour schemes so that they can
be read on a machine whose desktop colours are set to have white text
on a black background.

[Miguel Angel Vilela]

Data is available in many countries, I've used it in Switzerland and Australia so far without any problem. Can you please show us your code in a fully working page?

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[JavaJive]

The problem seems to be that the maximum number of sample points is
not 1024 as documented, but 512.

Also, if you plan to use the Google Chart API to display the results,
remember that the maximum URL length is 2048 and the maximum chart
size is 300,000.