Hi all, I have almost complete the explanation of the schema regarding the element (node, way and relation) I have just one last element to be understood.
The “tile” in the node table. I found in the code a function called “public.tile_for_point” [1] and seems that should be the one that do this process. But I’m not able to understood which is the output of the function, in particular what this part of code does: x := (x | (x << 8)) & 16711935; — 0x00FF00FF Thanks for all the reply. Best, Lorenzo [1] https://github.com/openstreetmap/openstreetmap-website/blob/751e8ad32c864f50eae9e9359d74a11dc44de007/db/structure.sql#L160 Il giorno 10 gen 2020, alle ore 15:51, Lorenzo Stucchi <lorenzostucch...@outlook.it<mailto:lorenzostucch...@outlook.it>> ha scritto: Thanks for the reply. Is this the formula [1] ? Best, Lorenzo [1] https://github.com/openstreetmap/openstreetmap-website/blob/751e8ad32c864f50eae9e9359d74a11dc44de007/db/structure.sql#L160 Il giorno 10 gen 2020, alle ore 15:22, Frederik Ramm <frede...@remote.org<mailto:frede...@remote.org>> ha scritto: Hi, On 10.01.20 15:08, Lorenzo Stucchi wrote: What does it mean the “timestamp” present in the table (“node", “way" and “relation")? When the object was last changed. What does it mean the “tile” element present in the “node" table? An integer derived from the lat/lon of the node using a mathematical formula. What does it mean the “sequence_id” in the “way_nodes” table and “relation_member” table? An integer used to store the ordering of the nodes/members (which node is the first, the second, ... in the way). Bye Frederik -- Frederik Ramm ## eMail frede...@remote.org<mailto:frede...@remote.org> ## N49°00'09" E008°23'33" _______________________________________________ dev mailing list dev@openstreetmap.org<mailto:dev@openstreetmap.org> https://lists.openstreetmap.org/listinfo/dev _______________________________________________ dev mailing list dev@openstreetmap.org<mailto:dev@openstreetmap.org> https://lists.openstreetmap.org/listinfo/dev
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