16. Module: Erdvinės duomenų bazės sąvokos su PostGIS

Erdvinės duomenų bazės leidžia saugoti įrašų geometrijas Duomenų bazėje bei teikti funkcionalumą įrašų su geometrijomis paieškai ir ištraukimui. Šiame modulyje mes naudojame PostGIS - PostgreSQL priedą, kad išmoktumėme kaip paruošti erdvinę duomenų bazę, importuoti duomenis į duomenų bazę ir panaudoti PostGIS teikiamas geografines funkcijas.

While working through this section, you may want to keep a copy of the PostGIS cheat sheet available from Boston GIS user group. Another useful resource is the online PostGIS documentation.

There are also some more extensive tutorials on PostGIS and Spatial Databases created by Boundless that are now hosted on the PostGIS’s website:

• Introduction to PostGIS

• PostGIS Database Tips and Tricks

See also PostGIS In Action.

• 16.1. Lesson: PostGIS Setup
  • 16.1.1. Installing under Ubuntu
  • 16.1.2. Installing under Windows
  • 16.1.3. Installing on Other Platforms
  • 16.1.4. Configuring Databases to use PostGIS
  • 16.1.5. Looking at the installed PostGIS functions
  • 16.1.6. Spatial Reference Systems
  • 16.1.7. In Conclusion
  • 16.1.8. What’s Next?
• 16.2. Lesson: Simple Feature Model
  • 16.2.1. What is OGC
  • 16.2.2. What is the SFS Model
  • 16.2.3. Add a geometry field to table
  • 16.2.4. Add a constraint based on geometry type
  • 16.2.5. Try Yourself
  • 16.2.6. Populate geometry_columns table
  • 16.2.7. Add geometry record to table using SQL
  • 16.2.8. In Conclusion
  • 16.2.9. What’s Next?
• 16.3. Lesson: Import and Export
  • 16.3.1. shp2pgsql
  • 16.3.2. pgsql2shp
  • 16.3.3. ogr2ogr
  • 16.3.4. DB tvarkyklė
  • 16.3.5. In Conclusion
  • 16.3.6. What’s Next?
• 16.4. Lesson: Spatial Queries
  • 16.4.1. Spatial Operators
  • 16.4.2. Spatial Indexes
  • 16.4.3. Try Yourself
  • 16.4.4. PostGIS Spatial Functions Demo
  • 16.4.5. In Conclusion
  • 16.4.6. What’s Next?
• 16.5. Lesson: Geometry Construction
  • 16.5.1. Creating Linestrings
  • 16.5.2. Try Yourself
  • 16.5.3. Creating Polygons
  • 16.5.4. Exercise: Linking Cities to People
  • 16.5.5. Looking at Our Schema
  • 16.5.6. Try Yourself
  • 16.5.7. Access Sub-Objects
  • 16.5.8. Data Processing
  • 16.5.9. Clipping
  • 16.5.10. Building Geometries from Other Geometries
  • 16.5.11. Geometry Cleaning
  • 16.5.12. Differences between tables
  • 16.5.13. Tablespaces
  • 16.5.14. In Conclusion