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GISpunkt-Seminar '''"PostGIS Einführung II"''' (Kürzel Sem_PostGIS_FF).


  Nächste Durchführung: Fr. 24. Januar 2014
Siehe auch:
* [[Kurs PostGIS Einführung I]] und [[GIS-Kurse]] allgemein.
* [[PostGIS]] und [[PostgreSQL]].
== Programm ==
* 09:00-09:15 Einführung, Vorstellung. (sep. Gruppe (A) diejenigen, die installieren, (B) die schon installiert haben) (SK)
* 09:15-10:00 (A): Installation inkl. Daten einlesen. (SK mit Helfer)
* 09:15-10:00 (B): Teil 1. Daten einlesen, Teil 2. "PostgreSQL Playing Cards" spielen. (AN+SK)
* 10:00-10:15 Überblick PostGIS 2.0, inkl. Extensions, Datentyp Geography. (SK)
* 10:15-10:30 SQL-Shell in QGIS. (AN)
* 10:30-11:00 PAUSE
* 11:00-11:45 "Spatial SQL Advanced" mit PostgreSQL: DE-9IM, Views (mit IDs), Trigger (Nachführung Fläche, Constraints im Leitungskataster), Rules (Updatable Views), Konsistenz-Checks. (AN)
* 11:45-12:30 Neue Vektorgeometrie-Funktionen in PostGIS 2.0 mit Übung. (SK)
* 12:30-13:30 MITTAGESSEN
* 13:30-14:00 Übung komplexe räumliche SQL-Abfragen. (AN)
* 14:00-15:00 PostGIS Raster mit Übung. (AN)
* 15:00-15:30 PostGIS 3D und PostGIS Topologie. (SK)
* 15:30-16:15 Ev. Performance-Optimierung, PostGIS-spezifischer Server-Setup (Konfiguration, Tablespaces, Clustering, Read-only-Optimierung). (SK)
* 16:15-16:30 Ausblick (u.a. Routing). (SK)
Vorkenntisse:
* Kurs "Einführung in PostGIS/PostgreSQL", bzw. Kenntnisse von SQL sowie Spatial SQL-Funktionen
* PostgreSQL Tools (psql, pgadminIII), PostGIS-Tools (shp2pgsql)
* Kenntnisse eines GIS zur Visualisierung und zum Editieren von Geodaten
Nicht behandelt:
* PostgreSQL Optimierung
* Lineare Referenzierung
* Routing
* Replikation
* Integration mit ArcGIS SDE
* etc.
== Unterlagen/Übungen ==
Siehe auch Materialien im Kursordner.
Online-Doku.:
* [http://www.postgresonline.com/downloads/special_feature/postgresql90_cheatsheet_A4.pdf Cheat Sheet "PostgreSQL 9.0"] (postgresonline.com)
* [http://www.postgis.us/downloads/postgis20_cheatsheet.pdf  Cheat Sheet "PostGIS 2.0"] (postgis.us)
* [http://www.postgis.us/downloads/postgis20_topology_cheatsheet.pdf Cheat Sheet "PostGIS 2.0 Topology"] (postgis.us)
Literatur:
* "PostGIS in Action", Obe und Hsu, Manning. [http://www.postgis.us/page_buy_book Online order]
* http://wiki.hsr.ch/Datenbanken/DatenbankLiteratur
Support/Firmen:
* [http://wiki.hsr.ch/Datenbanken/PostgreSQLReferenzen Referenzen von PostreSQL-Installationen]
* [http://www.postgres-support.com postgres-support.com Schweiz/Deutschland/Österreich]
Software:
* Siehe [[#Installation]].
Daten:
* Siehe [[#Installation]].
== Tipps und Tricks ==
Weitere:
* [[PostGIS - Tipps und Tricks]]
* [[PostgreSQL - Tipps und Tricks]]
* [[PostGIS-Beispiele]]
Restore... (pg_restore):
* "File Option": Dateiendungen für Dumps sind ".backup"; wechseln Sie zu "All Files (*.*)", wenn der Dump einen anderen Namen hat. Dumps erkennt man daran...
* "Restore Options #1" folgende Optionen, damit die Owner/Privileges Einstellungen ignoriert werden: "Don't save: Owner, Privilege, Tablespace".
Trigger-Funktion (Datenbank Uster):
  CREATE OR REPLACE FUNCTION test.insert_update_test_trigger_function()
    RETURNS trigger AS
  $BODY$
    DECLARE
    myrec RECORD;
  BEGIN
    NEW.flaeche := ST_Area(NEW.the_geom);
    NEW.umfang := ST_Perimeter(NEW.the_geom);
    SELECT array_to_string(array_agg(nz.zonenbez_gemeinde),'; ')
    AS zonen into myrec FROM raumplanung.nutzungszonen nz WHERE ST_Intersects(NEW.the_geom,nz.the_geom);
    NEW.zonen := myrec.zonen;
    RETURN NEW;
  END;
  $BODY$
  LANGUAGE plpgsql VOLATILE
  COST 100;
== Installation ==
Installation of PostgreSQL 9.1 (production, 32bit) with PostGIS 1.5 (production), PostGIS 2.0 Experimental (32bit) and QGIS:
* Step 0: Overview of installation of PostgreSQL 9.1.x and PostGIS 1.5 [http://geomatica.como.polimi.it/corsi/sw_gis/postgis_qgis_inst.pdf Instructions (PDF)]
* Step 1: Installation of PostgreSQL 9.1.x ([http://www.enterprisedb.com/products-services-training/pgdownload#windows Download PostgreSQL for Windows 32bit])
** NOTE FOR ALL USERS! Don't choose '64bit Build' - even if 64bit-CPU available (because of PostGIS 2.0 Experimental which is 32bit-only)
** Make a note of the password. If PostgreSQL is used on your own laptop (localhost) and for educational purposes, we uses user 'postgres' with password 'postgres'
* Step 2: PostGIS 1.5 (production, 32bit)
** Use Stackbuilder from PostgreSQL postprocessing step (NOTE: Internet access is needed here)
* Step 3: Installation of PostGIS 2.0 (experimental) ([http://www.postgis.org/download/windows/experimental.php Windows 32bit], see weblink "For PostgreSQL 9.1 (compiled against PostgreSQL 9.1.0...")
** Make a copy of the whole <<POSTGRE_DIR>>\bin to a backup directory since some PostGIS 1.5 executables will be replaced by PostGIS 2.0.
** Unzip ZIP-file of PostGIS 2.0 to an temporary installation directory (=> <<POSTGIS_INSTALL_DIR>> = 'postgis-pg91-binaries-2.0.0svn/').
** Follow instructions of the README file:
*** Make a copy of makepostgisdb_using_extensions.bat and makepostgisdb.bat (includes raster), and edit POSTGIS_INSTALL_DIR to adapt following variables: PGPASSWORD, THEDB, PGINSTALL (see listing below).
*** The only difference in these edits is one environment variable: for makepostgisdb_using_extensions.bat its 'THEDB=postgis20_extension' and for makepostgisdb.bat its 'THEDB=postgis20'.
*** Open a CMD-Shell as administrator (NOTE FOR WINDOWS USERS! Choose cmd.exe from Start menu but run cmd.exe with right click on it 'Run as administrator'!)
*** In CMD-Shell run makepostgisdb_using_extensions.bat and makepostgisdb.bat
* Step 4: ActivePerl (optional for certain courses, pls. ask course leader!)
** The database (Uster) needs pl/perl scripts inside PostsgreSQL db. We install ActivePerl ([http://www.activestate.com/activeperl/downloads Windows-Version]).
* Step 5: Installation of QGIS (Quantum GIS) Stable Version and Trunk Version
** There are two different installers. We use OSGeo4W ([http://download.osgeo.org/osgeo4w/osgeo4w-setup.exe osgeo4w-setup.exe]) (NOTE: Internet access is needed here)
*** When asked about the installation/runtime directory path, choose default (e.g. 'C:\OSGeo4W') on Windows. Usually you would install programs under 'C:\Program Files (x86)'. But there is evidence that some tools could be bothered by spaces in paths.
*** Choose "Advanced Installation" (use the newest version of each software => mostly the first click in the installation tree)
*** Category „Commandline Utilities“: setup: OSGeo4W Installer/Updater
*** Category „Desktop“: qgis, qgis-dev (NOTE: 'qgis-dev' means "Trunk"-Version)
*** Category „Libs“: psycopg2, pyqwt5-qt4, qt4-devel
** NOTE: This installation includes by default Python (2.5.2)
* Finish: Restart system (in order to restore environment like paths to libraries).
File 'makepostgisdb_using_extensions.bat':
  REM this is an example of how to create a new db and spatially enable it using CREATE EXTENSION
  set PGPORT=5432
  set PGHOST=localhost
  set PGUSER=postgres
  set PGPASSWORD=postgres
  set THEDB=postgis20_extension
  set PGINSTALL=C:\Program Files (x86)\PostgreSQL\9.1
  set PGADMIN=%PGINSTALL%\pgAdmin III
  set PGBIN=%PGINSTALL%\bin\
  set PGLIB=%PGINSTALL%\lib\
  set POSTGISVER=2.0
  xcopy bin\*.* "%PGBIN%"
  xcopy /I /S bin\postgisgui\* "%PGBIN%\postgisgui"
  xcopy /I plugins.d "%PGADMIN%\plugins.d"
  xcopy lib\*.* "%PGLIB%"
  xcopy share\extension\*.* "%PGINSTALL%\share\extension"
  "%PGBIN%\psql"  -c "CREATE DATABASE %THEDB%"
  "%PGBIN%\psql"  -d "%THEDB%" -c "CREATE EXTENSION postgis;"
  "%PGBIN%\psql"  -d "%THEDB%" -c "CREATE EXTENSION postgis_topology;"
 
  REM Uncomment the below line if this is a template database
  "%PGBIN%\psql" -d "%THEDB%" -c "UPDATE pg_database SET datistemplate = true WHERE datname = '%THEDB%';GRANT ALL ON geometry_columns TO PUBLIC; GRANT ALL ON spatial_ref_sys TO PUBLIC"
 
  pause
Creating new database 'Uster':
* Preparation steps:
** Close all postgres clients, if there are any open (like pgAdmin3, plsql, QGIS).
** Cleanup database (if needed): If there is already a database 'uster' drop it!
* Start pgAdmin3 as dbadmin
* Create new database:
** Name 'uster15', encoding: UTF-8, template: postgis15 (or postgis)
* Select database 'uster15'
** Activate extensions (right click) "New Object..." > "New Extension...":
** Choose extensions: adminpack, ltree and plperl.
Importing data into database 'uster':
* Start pgAdmin3 (as dbadmin)
* Choose (right click) "Restore..."
** Choose „uster.dump“ (All filese *.*)
** Change „Restore Options #1“ with following 3 options in order to ignore Owner/Privileges: "Don't save: Owner, Privilege, Tablespace".
* Import runs some minutes.
Importing another demo database:
* See British Columbia Data 'bc_data' at [[PostGIS-Beispiele]].
== Selbststudium ==
* tbd.
[[Kategorie:Weiterbildung]] [[Kategorie:PostGIS]] [[Kategorie:PostgreSQL]]

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