Types for Spatial Operations¶

The following types are used for spatial operation functions within GlobalMapper. These types use fixed, numeric constants, which are defined here.

globalmapper.GM_PredicateResultTargets_t8¶

Result targets for predicate results

Values

GM_PredicateResult_CreateNewSelection = 0: Create new selection from matched features
GM_PredicateResult_AddToSelection = 1: Add matched features to current selection
GM_PredicateResult_RemoveFromSelection = 2: Remove matched features from current selection
GM_PredicateResult_CreateNewLayer = 3: Clone matched features into a new layer
GM_PredicateResult_ReturnFeatures = 4: Return matched via GM_FoundFeatureResults_t*

globalmapper.GM_SpatialOperations_t8¶

Spatial operation types

Values

GM_SpatialOps_Intersection = 0: Returns the spatial intersection of two layers
GM_SpatialOps_Union = 1: Returns the the spatial union of two layers, or among features of a single layer
GM_SpatialOps_Difference = 2: Returns the the spatial difference between two layers
GM_SpatialOps_SymmetricDifference = 3: Returns the the spatial symmetric difference between two layers

globalmapper.GM_SpatialOps_Errorhandling_t8¶

Flags specifying how to handle invalid input geometries

Values

globalmapper.GM_SpatialPredicates_t16¶

Spatial predicate types

Values

GM_SpatialPredicates_Intersects = 1: Calculates the set of features that intersect features in another layer
GM_SpatialPredicates_Overlaps = 2: Calculates the set of features that overlap features in another layer
GM_SpatialPredicates_Touches = 4: Calculates the set of features that touch features in another layer
GM_SpatialPredicates_Contains = 8: Calculates the set of features that wholly contain features in another layer
GM_SpatialPredicates_IsEqual = 16: Calculates the set of features that have have an exact match with the geometry of a feature in another layer
GM_SpatialPredicates_IsWithin = 32: Calculates the set of features that are wholly contained by a feature in another layer
GM_SpatialPredicates_IsDisjoint = 64: Calculates the set of features that do not intersect features in another layer

globalmapper.GM_SpatialThinAlg_t8¶

Spatial thinning algorithm - Specify which point to select from each bin grid when thinning

Values

GM_ThinAlg_Min = 0: Use point with minimum elevation in bin
GM_ThinAlg_Max = 1: Use point with maximum elevation in bin
GM_ThinAlg_Med = 2: Use point with median elevation in bin
GM_ThinAlg_3D = 3: Keep median point in each 3D cube of bin size
GM_ThinAlg_KeepNth = 4: Keep every Nth point (i.e. every 4th return)
GM_ThinAlg_SkipNth = 5: Skip every Nth point (i.e. skip every 4th return - thin by 25%)

GM_ThinAlg_NumTypes = 6