Spatial Selection and Spatial Joins Flashcards
Explain multipart features
a point, line, or polygon that has more than one part, but is defined as one feature
Select by location: intersect
returns any feature that either fully or partially overlaps the source features
select by location: within a distance
creates buffers using the buffer distance around the source features and returns all features intersecting the buffer zones
select by location: contains
to be selected, the geometry of the source must fall inside the target feature+boundaries
select by location: completely contains
to be selected, the parts of the target feature must contain the geometries of the source feature - source feature cannot overlap the target feature
- source feature must be a polygon
select by location: within
to be selected, the target feature must fall inside the source feature
select by location: completely within
to be selected, all of the target feature must be in the source feature
- source feature must be a polygon - opposite of completely contains
select by location: are identical to
selected if features are strictly equal
select by location: boundary touches
selected if the intersection with the source feature is non-empty
select by location: share a line segment with
source and target share a vertices
- only lines and polygons
select by location: crossed by the outline of
source and target share at least an edge, vertex, or endpoint, but not a line segment
Define centroid
Center of a geometric feature
select by location: have their center in
selected if target centroid falls into the source feature
Explain misclassification matrix
Computes the overall accuracy between the classified map and the reference data
Define metadata
data about data - helps to share data and avoid many errors
