Across
- 1. A request to select features or records from a database.
- 3. A representation of the world as a surface divided into a grid of cells of a uniform size.
- 4. Overlays the pixel or grid cell values in each data layer using Boolean, arithmetic or relational operators to produce a new value in the composite data layer.
- 5. Represents phenomena that have clear boundaries with attributes that are descriptions, classes, or categories.
- 6. Cell values vary continuously to form a surface.
- 8. The reduction and simplification of features for change of scale or resolution.
- 9. is an attribute or set of attributes in one table that match the primary key attributes in another table.
- 10. Aligning geographic data to known coordinate system so it can be viewed, queried, and analysed.
- 11. A representation of the world using points, lines, and polygons (area).
- 12. (TIN) A vector data structure that partitions geographic space into continguous, non-overlapping triangles.
- 15. Analyse the relationships between an entity and surrounding entity/attributes.
- 16. A database or file structure used primarily to store, query, and manipulate spatial data.
- 20. Overlays polygons in one layer over polygons in another layer.
- 21. A database or tabular file containing information about a set of geographic features.
- 23. A zone inside a polygon constructed by a fixed distance from the edge of the polygon.
Down
- 2. is a representation of the real world.
- 4. Organises data into one or more tables (or “relations”) of columns and rows (arrays) containing attributes, connected by common data known as keys.
- 5. (DBMS) is a software application designed to organise the effiecient and effective storage and access of data.
- 7. Geometric characteristics of object which do not change under transformations.
- 13. The process of taking input raster cell values and replacing them with new output raster cell values.
- 14. (DEM) Digital Representation of topography. Represented by cell based values with a single elevation value representing the entire area of the cell.
- 17. The geometric intersection of two or more datasets to combine, erase, modify, or update features in a new output dataset.
- 18. A language that defines a syntax for combing data layers by applying a combination of mathematical, logical, or Boolean operators to create new data layers.
- 19. a column with unique identifiers for each entity or row (eg. FID).
- 22. a zone constructed outward from an isolated object (point or line) to a specific distance.