Graham McIntire
158ee9d323
Catalog-only system for LIDAR-derived 1m DEMs covering Texas. We do not mirror raster data — the DB stores tile metadata (URL + footprint geometry) and elevation values are streamed on-demand from public USGS 3DEP / TNRIS Cloud-Optimized GeoTIFFs via GDAL /vsicurl/ HTTP byte-range reads. Used for future tower coverage line-of-sight calculations. - Enable PostGIS extension; tile footprints indexed via GiST - Catalog sync from USGS 3DEP (primary) and TNRIS (fallback for gaps) - Tile dedup by ST_Contains so TNRIS doesn't duplicate 3DEP coverage - Single-point reads via gdallocationinfo with tile fallthrough on nodata - Grid retrieval via gdal_translate AAIGrid with multi-tile mosaicing - Monthly Oban cron worker keeps catalog fresh - gdal-bin added to runtime image; geo_postgis dep added
39 lines
975 B
Elixir
39 lines
975 B
Elixir
defmodule Towerops.Lidar.Test.FakeParser do
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@moduledoc """
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Test-only stand-in for `Towerops.Lidar.Sources.ThreeDep.GdalParser`.
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Tests configure canned tile responses per project name via `put_state/1`,
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which are stored in an ETS table so the parser process can be the test
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process or any Oban-spawned worker.
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"""
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@table :lidar_catalog_fake_parser
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def put_state(map) do
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ensure_table()
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:ets.insert(@table, {:state, map})
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end
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def enumerate(project_name, _opts) do
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ensure_table()
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case :ets.lookup(@table, :state) do
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[{:state, map}] ->
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case Map.fetch(map, project_name) do
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{:ok, {:error, _} = err} -> err
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{:ok, tiles} -> {:ok, tiles}
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:error -> {:error, :unknown_project}
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end
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_ ->
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{:error, :no_state}
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end
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end
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defp ensure_table do
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case :ets.info(@table) do
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:undefined -> :ets.new(@table, [:named_table, :public, :set])
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_ -> @table
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end
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end
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end
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