what does file 'oxford_geom_sift.float' mean？

[wy3257]

Hi,
I am trying to run this code on a different dataset, but I cannot figure out what does the oxford_geom_sift.float mean. Could you tell me what's it and how can I get it of another dataset？ Thanks in advance.

[gtolias]

This file contains the shape of each local feature in the form [x y a b c], with x y corresponding to the center of the ellipse and a b c representing its shape. In this case, only the x y coordinates of the query images are used to maintain only the features that fall inside the query bounding box. In revisitop/search_index.m does not require this. The query images are first cropped, local features are extracted, saved, and provided to be used for search. Cropping first and then extracting is the protocol used in the RevisitOP benchmark.