US CSB: eight editions, and a real field id - #252
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One archive carries the whole sequence: CSB1724.gdb has a CDL<year> crop column for every year from 2017 to 2024, so each edition reads the same source with its own column and takes its determination date from the variant. The dissolve merges every CSB polygon of one crop within a state and splits it again, so an output field is not a source CSB. CSBID and CNTY survived through aggfunc="first" and described an arbitrary member of the group — CSBID gave 3,093 distinct ids to 7.5 million fields. The fields are numbered now and neither column is published as if it described them. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DVx9uQV2QPM8ecPAY3ZjXG
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One archive carries the whole sequence:
CSB1724.gdbhas aCDL<year>column for 2017-2024, so each edition reads it with its own column and dates from its variant (it was a constant 2023-05-01).The dissolve leaves no source identifier — it merges every CSB polygon of one crop within a state and splits it again, so
CSBIDsurvived throughaggfunc="first"and described an arbitrary member of the group: 3,093 distinct ids for 7.5 million fields. The fields are numbered now, and neither column is published as if it described them.Eight editions, ~61M field-years. Each dissolve takes ~5.5 h, so it is worth getting right before running.
🤖 Generated with Claude Code
https://claude.ai/code/session_01DVx9uQV2QPM8ecPAY3ZjXG