Stretching broken?

[jbednar]

As of a93a002 (27 August), these two URLs generated similar plots:

http://localhost:6582/CENSUS_SYN_PEOPLE?allowStretch=True&latlon=-134.7;21.0;-68.8;47.3

http://localhost:6582/CENSUS_TRACTS?allowStretch=True&latlon=-134.7;21.0;-68.8;47.3

However, in today's version, the plot from the SYN_PEOPLE dataset is no longer stretched. Somehow allowStretch is no longer working for that dataset?

[jbednar]

It looks like this is cache related. If I delete the cache and try the above two examples again, they both work. But if I then delete the allowStretch=True& bits and visit those URLs, the TRACTS one works, but the SYN_PEOPLE one gives only the bottom half of the US.

Similarly, if I delete the cache, then visit the two URLs without allowStretch, they work fine, but if I then visit them with stretching on, only the TRACTS example actually does stretch.

I looks like the cache is not storing the value of allowStretch for the SYN_PEOPLE dataset, and returns bogus information if the version from the previous setting is available in the cache. It's strange that this happens only for one of the datasets!

[JosephCottam]

Insufficient significant digits on the cache path leads to stretch and non-stretch having the same path but only on the full SYN_PEOPLE data. This also leads to the order-dependent behavior. Expanding the number of digits as a fix (will not cover 100% of cases, but will get it by).