CAD V GIS Mgr Ji tyrok Ph D

CAD V - GIS Mgr. Jiří Čtyroký Ph. D Ing. Martin Šilha

GIS Geographic information system – information system based on geography location related data (geodata, spatial data) GIS applications examples: Property cadastre – http: //nahlizenidokn. cuzk. cz/ Development plan – http: //mpp. praha. eu/app/map/Vykresy. UP/

GIS The most common representation of geodata are vector based data. Vector geodata are composed of description of geoobjects (features). Geoobject (feature) is defined by: Spatial description (shape, location, topology) Non-spatial description (so called attributes, properties) Geoobjects (features) are represented as: points lines polygons

CAD x GIS CAD GIS Object is defined by: Shape Location (Drawing style) Attributes

GIS – analyses What is at selected spot? How accessible is my school? How many people are touched by high noise? How many bus stops are in the district? What is visible from the new tower? . . . http: //mezismrky. cz/borova_siska/materialy/gis 1_5 analyzy. pdf

GIS – feature classes, layers Geodata are stored as „feature classes“ (layers) Various data models: Vector Raster 3 D TIN Point clouds, … Data are stored in Geodatabases

Vector x Rasetr Bitmap and vector graphics in sketches: comparison source: http: //www. graphiclive. eu/Images/rozdil. gif source : http: //www. tutoriarts. cz/uvod-do-illustratoru-seznameni-s-programemvektor-vs-bitmapa-1029 Bitmap and vector graphics in photography: comparison source : http: //www. aldebaran. cz/onlineskola/etapy/grafika/

GIS Software Commercial: Open Source: Arc. GIS for Desktop (ESRI) q. GIS Geomedia (Hexagon) GRASS GIS Mapinfo (Pitney Bowes) gv. SIG Elyx GIS (1 st Spatial) u. DIG Auto. CAD Map 3 D (Autodesk) IDRISI GIS (Clark Labs) OCAD (OCAD Inc. )

Practical information Password: kurz_gis Login: kurz_gis P - public (GIS) shared drive for data (read only!) H – your student folder website: http: //gis. 4 ok. cz/