# 857109 Geographical information systems

Type
Lecture and exercise
Semester hours
2
Lecturer (assistant)
Organisation
Offered in
Sommersemester 2019
Languages of instruction
Deutsch

Content

Introduction: Basics of GIS, history, terms and definitions.
Advantages of a GIS: Geometry, thematic und topology.
A first get to know: Example of a spatial query and an overlay, GIS for everybody.
Basics of vector-GIS: Vector GIS model, point, line, area, area and islands, networks.
Basics of raster-GIS: Raster GIS model, raster-metrics, lines and areas in raster model, vector versus raster.
Geometry, thematic, topology in vector model and raster model.
Overlay operators: Intersect (AND), Minus (AND NOT), Union (OR), Exclusive OR (XOR).
Spatial operators: overlap, entirely contain, entirely contained by, contain, contained by, touch, meet, terminates in, is terminus of, passes through, is passed through by, on boundary of, has on boundary, within a distance, spatial equal.
Databases: Basics, database schemata, Relations between data groups, database types, hierarchical model, network-model, relational model, objectoriented model, object-relational model, keys and access paths.
Structured Query Language (SQL): Important SQL statements, create, insert, update, select, join of tables.
Coordinate systems: Mathematical reference surfaces of the earth (plane, sphere, ellipsoid), earth´s surface - sphere - geoid ´ ellipsoid, geodetic datum, transformation between 2 geodetic datum systems, altitude reference system in Austria.
Projections: Plane, cylindrical, conical projections, projections used in Austria: Soldner-Cassini, Gauß-Krüger projection, ´Bundesmeldenetz´, Universal Transverse Mercator, conformal Lambert.
Digital terrain-models (DTM): What is a DTM ?, applications, types of data, data-structures.
Map ´ Algebra: Basics, map algebra language, map algebra functions, local, focal, incremental, zonal functions