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
18 lines
563 B
Elixir
18 lines
563 B
Elixir
defmodule Towerops.Repo.Migrations.CreateLidarSyncLogs do
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use Ecto.Migration
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def change do
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create table(:lidar_sync_logs, primary_key: false) do
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add :id, :binary_id, primary_key: true
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add :source, :string, null: false
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add :status, :string, null: false
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add :projects_synced, :integer, default: 0
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add :tiles_upserted, :integer, default: 0
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add :errors, :map
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add :duration_ms, :integer
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add :inserted_at, :utc_datetime, null: false
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end
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create index(:lidar_sync_logs, [:source, :inserted_at])
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end
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end
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