Humble and very tired Perl User seeks wisdom of the Experts, Hackers, Gurus and Wizards of the Monastery.

I have a file of items with their x,y coordinates. e.g.
id,x,y
thingy1,70459.318061,95537.539359
.
.
.
thingy79036,70459.318061,95537.539359

I have a file with the lower left and upper right x,y coordinate pairs of a series of grids. e.g.
map,grid,subgrid,x0,y0,x1,y1
044,15,2,061866,133466,062933,134399
.
.
.
107,14,4,105600,090533,106666,091466

I need to determine in which map-grid-subgrid is thingy*. Please note that there are ~100,000 thingies to match with a file of ~32,000 map-grid-subgrids.

Advice or redirection to the proper node would be appreciated.

In reply to Search file of coordinates by Anonymous Monk

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