QGIS User Guide - OSGeo Download Server

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12 USO DEI PLUGIN CORE QGIS • Username: Username for use when a database is password protected. • Password: Password for use when a database is password protected. • Predefined Queries: Tab to open the “Predefined Queries” window. • Database Connection: Tab to open the “Database Connection” window. • SQL Query: Tab to open the “SQL Query” window. • Help: Displays the on line help. • OK: Close the main “Database Connection” window. Running SQL queries SQL queries are used to extract information from a database or ODBC resource. In eVis the output from these queries is a vector layer added to the QGIS map window. Click on the SQL Query tab to display the SQL query interface. SQL commands can be entered in this text window. A helpful tutorial on SQL commands is available athttp://www.w3schools.com/sql/. For example, to extract all of the data from a worksheet in an Excel file, “select * from [sheet1$]” where“sheet1” is the name of the worksheet. Click on the Run Query button to execute the command. If the query is successful a Database File Selection window will be displayed. If the query is not successful an error message will appear in the Output Console widow. In the Database File Selection window, enter the name of the layer that will be created from the results of the query in the Name of New Layer textbox. • SQL Query Text Window: A screen to type SQL queries. • Run Query: Button to execute the query entered in the SQL Query Window. • Console Window: The console window where messages related to processing are displayed. • Help: Displays the on line help. • OK: If this check-box is checked, only the file name from the A will be appended to the Base Path. • Apply rule to all documents: Closes the main “Database Connection” window. Use the X Coordinate and Y Coordinate dropdown menus to select the field from the database that store the “X” (or longitude) and “Y” (or latitude) coordinates. Clicking on the OK button causes the vector layer created from the SQL query to be displayed in the QGIS map window. To save this vector file for future use, you can use the QGIS “Save as shapefile” command that is QGIS 1.4.0 User Guide 154
Figura 57: The eVis SQL query tab 12.5 eVis Plugin accessed by right clicking on the layer name in the QGIS map legend and then selecting “Save as shapefile.” Running predefined queries With predefined queries you can select previously written queries stored in XML format in a file. This is particularly helpful if you are not familiar with SQL commands. Click on the Predefined Queries tab to display the predefined query interface. To load a set of predefined queries click on the Open File icon. This opens the Open File window which is used to locate the file containing the SQL queries. When the queries are loaded QGIS 1.4.0 User Guide 155
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Quantum GIS Guida all’uso Version
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Copyright c○ 2004 - 2010 Quantum
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Indice Titolo i Preambolo ii Indice
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Indice 6. Lavorare con i dati raste
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Indice 12.11.Plugin MapServer Expor
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Elenco delle figure 1. Una sessione
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Elenco delle figure 80. OSM downloa
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QGIS Tips QGIS Tips 1. DOCUMENTAZIO
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1. Premessa Benvenuti nel meravigli
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• creazione e modifica di shapefi
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• Barra degli strumenti Editing A
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• Inserimento testo: Nome da most
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2. Introduzione al GIS Un Sistema I
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2.1.2. Dati vettoriali 2.1 Come mai
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3.3 Sessione di esempio utente, inc
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3.3 Sessione di esempio 5. ⊙ ’F
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[--extent xmin,ymin,xmax,ymax] set
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L’interfaccia di QGIS è divisa i
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4.2 Interfaccia QGIS Simplify Featu
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4.2 Interfaccia QGIS • Plugins -
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- Rimuovi - Apri tabella attributi
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4.2.7. Barra di stato 4.3 Visualizz
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4.4 Misurazioni x Per impostazione
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4.6 Output Il file di progetto è s
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4.7 Opzioni dell’interfaccia graf
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Figura 5: Impostazioni del proxy in
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5. Lavorare con i dati vettoriali Q
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5.1.2. Ottimizzare le prestazioni F
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5.2 Layer PostGIS • Fornire event
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5.2 Layer PostGIS QGIS richiede che
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5.2.5. Migliorare le prestazioni 5.
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5.3 Layer SpatiaLite • If everyth
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Simbolo singolo - lo stesso stile
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Understanding the new generation sy
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5.4 Proprietà dei layer vettoriali
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(a) Line composed from three simple
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Figura 18: Selezione di un elemento
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5.5 Modifica qualunque operazione d
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Abilitare la modifica topologica 5.
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Tip 19 MARKER DEI VERTICI La versio
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Modificare i vertici di un elemento
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5.5 Modifica gli elementi dei quali
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Figura 21: Finestra di creazione di
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5.7 Selezione mediante interrogazio
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6.2. Caricamento dati raster in QGI
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6.3.1. Scheda Simbologia QGIS può
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6.3 Finestra delle proprietà raste
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6.3.7. Scheda Istogramma 6.3 Finest
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7.2 Client WMS quindi consulta le s
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7.2 Client WMS Figura 24: Finestra
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• Proprietà server - Versione WM
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7.3.1. Caricare un layer WFS 7.3 Cl
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8. Lavorare con le proiezioni QGIS
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1. Selezionare Proprietà progetto
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Figura 28: Finestra del CRS persona
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9. Integrazione con GRASS GIS Il pl
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Page 165 and 166: Understanding the Display window 12
Page 167 and 168: 12.5 eVis Plugin • File location:
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Page 177 and 178: 12.5 eVis Plugin SELECT Attribute
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12.17. Other core plugins 12.17 Oth
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14. Aiuto e Supporto 14.1. Mailingl
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14.4 Blog tipologia. Selezionare pa
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A.2. Formati raster GDAL supportati
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B. Moduli degli strumenti GRASS La
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B.3 Moduli negli strumenti GRASS pe
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B.8. Moduli negli strumenti GRASS p
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0. This License applies to any prog
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distribution of the Program. If any
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C.1. Quantum GIS Qt exception for G
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A “Secondary Section” is a name
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accessible at the stated location u
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You may combine the Document with o
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Each version of the License is give
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Letteratura citata [1] T. Mitchell.
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Indice analitico Keyboard shortcuts
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Indice analitico sistema di proiezi
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