Piezometric contour lines (isopiestic lines)Courbes altimétriques isopièzes

Courbes altimétriques isopièzesPiezometric contour lines (isopiestic lines)

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This API provides isopiestic lines (hydroisohypses), which are contour lines connecting points of equal groundwater elevation in the subsurface. Knowledge of these contours allows determination of the direction of groundwater flow within an aquifer. The elevation values are calculated as multi-year averages based on piezometric survey data. The dataset is maintained by the Geneva territorial information system (Système d'information du territoire genevois), covering the canton of Geneva, Switzerland, and is relevant for hydrogeological analysis and groundwater management.Les isopièzes (ou hydroisohypses) sont des courbes altimétriques de même niveau d'eau dans le sous-sol. La connaissance des isopièzes permet de déterminer le sens des écoulements d'une nappe. L'altitude est calculée sur des moyennes sur plusieurs années en fonction des données des relevés piézométr…

watergeospatialenvironment

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Data schema (4 fields)

Click a field to see example values.

Field	Type	Description
ALTITUDE	double	Groundwater level altitude represented by the isopiece contour line.Groundwater level altitude represented by the isopiece contour line.
NOM_NAPPENom nappe	string	Name of the groundwater aquifer to which the contour belongs.Name of the groundwater aquifer to which the contour belongs.
OBJECTID	oid	Internal record identifier.Internal record identifier.
Shape__LengthSHAPE.LEN	double	Length of the geometric line feature, in map units.Length of the geometric line feature, in map units.

Schema captured from arcgis 29 days ago.

Query the data

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Sample data (3 records)

ALTITUDE	NOM_NAPPE	OBJECTID	Shape__Length
412	Grand Saconnex	1	195.372397743386
406	Grand Saconnex	2	400.99050457975
444	Grand Saconnex	3	642.424557539147

Live sample captured at profiling time — values may have changed upstream.

Verification Status

Using the API

Configuration

Base URL: https://vector.sitg.ge.ch/arcgis/rest/services/GOL_ISOPIEZE/FeatureServer

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Query examples

curl -s 'https://vector.sitg.ge.ch/arcgis/rest/services/GOL_ISOPIEZE/FeatureServer?f=json' -H 'Accept: application/json'

Service definition: the list of layers.

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Dataset

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