dem_geodetic_to_ecef — DEM `geodesy` op

• Data kinds: none → points (an op determined by its arguments alone — it takes no image or data input)

• Call: import demops; demops.dem_geodetic_to_ecef(lat_deg, lon_deg, height_m=0.0) (or opsdem.get("dem_geodetic_to_ecef"))

Usage

> This operator's description has not been translated yet. The original text follows as it is.

測地座標(緯度・経度・楕円体高)→ 地心直交座標 ECEF [m]。

地球の中心を原点、赤道面の本初子午線方向を x、東経 90 度を y、北極を z と

する右手系。地形を「地球中心から見た座標」で扱いたいときの入口。

球ではなく WGS84 楕円体で計算する —— 球近似は緯度 45 度あたりで

最大 21 km ずれる(極半径が赤道半径より短いぶん)。

Args:

lat_deg / lon_deg: 緯度・経度 [度]。配列可(同じ形)。

height_m: 楕円体高 [m]。スカラでも配列でも可。

Returns:

`(..., 3)` の ECEF 座標 [m]。

Detailed usage guide

• dem_terrain_analysis family guide

References (sample data, literature)

• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).

• Operator provenance and references — the sources of the research/methods this op family came from.

• The canonical algorithm (author, year) and its uses are named in the family usage guide above.

Runnable examples (verified samples that actually call this op)

• (none yet)

Ops the type connects to (they accept `points` as input)

dem_ecef_to_geodetic

Same category (`geodesy`)

dem_ecef_to_geodetic · dem_geocentric_grid · dem_earth_curvature_drop · dem_cell_size_webmercator · dem_geodetic_slope

*Provenance: demops.py — DEM operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

dem_geodetic_to_ecef — DEM geodesy op