Package pygeodesy3 :: Package elevations :: Module webs

Module webs

Web-services-based elevations and CONUS geoid heights.

Functions to obtain elevations and geoid heights thru web services, for (lat, lon) locations, currently limited to the Conterminous US (CONUS), see also modules geoids heights and USGS10mElev.py.

See Also: Module geoids to get geoid heights from other sources and for regions other than CONUS.

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Version: 24.02.20

Classes
	Elevation2Tuple 2-Tuple `(elevation, data_source)` in `meter` and `str`.
	GeoidHeight2Tuple 2-Tuple `(height, model_name)`, geoid `height` in `meter` and `model_name` as `str`.

Functions

elevation2(lat, lon, timeout=2.0)
Get the geoid elevation at an NAD83 to NAVD88 location.

geoidHeight2(lat, lon, model=0, timeout=2.0)
Get the NAVD88 geoid height at an NAD83 location.

Variables
	__all__ = `_ALL_LAZY.elevations_webs`

Function Details

elevation2 (lat, lon, timeout=2.0)

Get the geoid elevation at an NAD83 to NAVD88 location.

Arguments:

lat - Latitude (degrees).
lon - Longitude (degrees).
timeout - Optional, query timeout (seconds).

Returns:

An Elevation2Tuple

(elevation, 
          data_source)

or (None, "error") in case of errors.

Raises:

ValueError - Invalid timeout.

Note: The returned elevation is None if lat or lon is invalid or outside the Conterminous US (CONUS), if conversion failed or if the query timed out. The "error" is the HTTP-, IO-, SSL- or other -Error as a string (str).

See Also: USGS Elevation Point Query Service, the FAQ, geoid.py, module geoids, classes GeoidG2012B, GeoidKarney and GeoidPGM.

geoidHeight2 (lat, lon, model=0, timeout=2.0)

Get the NAVD88 geoid height at an NAD83 location.

Arguments:

lat - Latitude (degrees).
lon - Longitude (degrees).
model - Optional, geoid model ID (int).
timeout - Optional, query timeout (seconds).

Returns:

An GeoidHeight2Tuple

(height, 
          model_name)

or (None, "error") in case of errors.

Raises:

ValueError - Invalid timeout.

Note: The returned height is None if lat or lon is invalid or outside the Conterminous US (CONUS), if the model was invalid, if conversion failed or if the query timed out. The "error" is the HTTP-, IO-, SSL-, URL- or other -Error as a string (str).

See Also: NOAA National Geodetic Survey, Geoid, USGS10mElev.py, module geoids, classes GeoidG2012B, GeoidKarney and GeoidPGM.