Set
A group of features and their associated data, often used as a unit for analysis or processing.
What is Set?
A "Set" in GIS (Geographic Information Systems) is frequently defined as a group of spatial elements or records that have similar characteristics or satisfy specific requirements.
A collection of chosen features (points, lines, or polygons) from a dataset is referred to as a set in a broad GIS context.
Using searches, filters, or spatial operations (such as choosing every structure in a flood zone), you may generate a set.
After that, these sets can be exported, analysed, or visualized.
Sets are utilized in Set Algebra (GIS operations) to carry out tasks such as
All of the components from both sets are combined in a union (A ∪ B).
Only elements shared by both sets are present at the intersection (A ∩ B).
Elements in one set but not in the other are the difference (A − B).
As an example, you could construct a collection of highway-designated roads or a collection of parcels greater than one hectare, and then map or analyse just those attributes.
Related Keywords
Spatial data (locations, shapes, and coordinates) and attribute data (descriptive information about those locations) are combined to create a GIS dataset, which is an organized collection of geographic data. It can contain survey data, maps, satellite imagery, and elevation models, facilitating analysis, visualization, and decision-making in domains such as transportation, urban planning, and environmental monitoring.
In GIS, set analysis is the process of comparing and examining spatial datasets to find patterns, overlaps, differences, and correlations. It supports decision-making in fields like resource management, environmental studies, and land use planning by analysing the relationships between geographic features across several levels using operations like union, intersection, and difference.
A collection of spatial data that depicts actual objects, such buildings, roads, or rivers, is called a GIS feature set. In mapping and geospatial applications, each feature comprises geometry (points, lines, or polygons) and related properties that facilitate analysis, visualization, and decision-making.
In GIS, data that depicts the position, form, and connections of geographic features on the surface of the earth is referred to as a spatial dataset. It contains the coordinates, geometry, and characteristics of things like polygons (land parcels, cities), lines (roads, rivers), and points (wells, schools). In GIS, mapping, analysis, and decision-making all depend on spatial datasets.