Shptree notes

= shptree Processing Notes =

(for the Benchmarking 2010 exercise)

shptree Depth
No depth parameter was used for the shptree command, which means the shptree code would determine the optimal depth. The determined depths were:

Verifying the qix file

 * shptreetst utility was used to verify the integrity of qix file
 * you should see a message like:



$ shptreetst contour-0.qix

This new LSB index supports a shapefile with 221671 shapes, 16 depth shapes 0, node 4, -8.187613,36.166759,3.274251,43.666687 shapes 0, node 4, -8.187613,36.166759,-1.883588,40.291719 shapes 0, node 4, -8.187613,36.166759,-4.720399,38.435487 shapes 0, node 1, -8.187613,36.166759,-6.280646,37.414560 shapes 0, node 2, -7.329478,36.728269,-6.280646,37.414560 ...  read entire file now at quad box rec 20 file pos 1000 using last read box as a search result of rectangle search was 86554, 86580, 86586, 86598, 86638, 86641, 86642, 86643, 86660, 86667, 195862, 195895, 195901, 195903, 195926, 196873, 197711,

buildings.shp

 * caused a Segmentation fault initially on our BenchmarkB Linux server (with 8GB RAM)
 * to solve this we...