Using QGIS and ISCGM Global Map

2013. 11. 04

Minpa Lee(mapplus@gmail.com)Heegu Park(hgpark@gaia3d.com)

Lecturer

사진

Name: Minpa Lee

Department: R&D, Mango System inc.

Contact: #A201, 98, Haenggung-ro, Paldal-gu, Suwon-si, Gyeonggi-do, 442-130, Korea E-mail: mapplus@gmail.com

<Education Background>- BA on Seoul National University, Korea, Geography Education(03. 1992 ~ 02. 1999)

<Community> - OSGeo, Charter member - OSGeo Korean Chapter, Korean Translator

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Contents

• I. Overview–QGIS & Global map– I-1. QGIS Overview– I-2. ISCGM Global Map V.2

• II. Installing QGIS– II-1. Installing QGIS– II-2. Installing Google Earth

• III. Using QGIS – III-1. QGIS GUI– III-2. QGIS Toolbar– III-3. Working with Vector Data– III-4. Working with Raster Data

• IV. Extending QGIS– IV-1. QGIS Plugins

• V. Editing Global Map Data – V-1. Setting Environment– V-2. Digitizing Toolbar– V-3. Digitizing an Existing Layer– V-4. Creating a New Layer

• VI. Import & Export– VI-1. Import– VI-2. Export– VI-3. Export to OGC GML format

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I. OVERVIEW – QGIS & GLOBAL MAP

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I-1. QGIS Overview

QGIS Free & Open Source Geographic Information System

OS

MS Windows Mac OSX Linux, Unix

License

GPL

Language

C++, Python

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I-1. QGIS Overview QGIS

QGISDesk-top QGIS

Browser

QGISClient

QGISServer

QGIS Library(C++)

Desktop GIS for querying, creating, editing, analyzing geospatial data

Browser for spatial data

Web Mapping Frame-work based on QGIS Server and GeoExt

WMS 1.3.0, 1.1.1 Server FastCGI/CGI Program SLD Support

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I-2. ISCGM Global Map V.2ISCGM - International Steering Committee for Global Mapping

http://iscgm.org7

I-2. ISCGM Global Map V.2

Layer Name Type Inclusion Abbreviation

Transportation

Airport Point Optional airpRailroad Station Point Optional rstatpRailroad Edge Mandatory raillRoad Edge Mandatory roadlTrails and Tracks line Edge Mandatory TraillFerry route Edge Optional ferrylPort Point Optional portp

Boundaries

Political Boundary Point Mandatory polbndpCoast Line Edge Mandatory coastlPolitical Boundary Line Edge Mandatory polbndlPolitical Boundary Area Face Mandatory polbnda

Drainage

Miscellaneous(Dam/Weir/Island, Spring/Water-Hole)

Point Optional miscp

Aqueduct/Canal/Flume/Penstock Edge Optional aquelMiscellaneous(Dam/Weir) Edge Optional misclWater Course Edge Mandatory riverlInland Water Face Mandatory inwatera

PopulationCentres

Built-up Area (point) Point Optional builtuppBuilt-up Area (face) Face Optional builtupa

Global Map data is equivalent to 1:1 million scale map

Vector Layer – Transportation, Boundaries, Drainage, Population Centres

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I-2. ISCGM Global Map V.2

Layer Name Type

Raster

Elevation RasterThe vertical distance between the surface of the earth and the standard sea level

Vegetation Raster Percent Tree Cover data by an integer value from 0 to 100 Land Cover Raster GLCNMO global legend Land Use Raster Codes developed for Global Map

Eleva-tion

Vegeta-tion

Land Cover

Land Use

Raster Layer – Elevation, Vegetation, Land Cover, Land Use

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I-2. ISCGM Global Map V.2Process overview

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I-2. ISCGM Global Map V.2Topology Rule – Edge(Line)

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I-2. ISCGM Global Map V.2Topology Rule – Face(Polygon)

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I-2. ISCGM Global Map V.2Sample Layers - Korea

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II. INSTALLING QGIS

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II-1. Installing QGISInstall QGIS Dufour (2.0.1) on Windows OS

① Download latest QGIS Dufour (2.0.1) from http://www.qgis.org/ ② Save the File to your machine and double click on the .exe file to in-

stall ③ Accept the install defaults to complete the process ④ Launch QGIS

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II-1. Installing QGISChange the language setting/interface of QGIS

① Launch QGIS② [ 설정 ] [ 옵션… ] [ 언어설정 ] [U.S. English] [ 확인 ]③ Select [Setting] [Options…] menu and Select [Locale] [U.S. Eng-

lish] [OK] ④ Restart QGIS

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II-2. Installing Google EarthInstall Google Earth on Windows OS

① Download latest Google Earth from http://www.google.com/intl/en/earth/ or http://earth.google.com

② Save the File to your machine and Double click on the .exe file to install

③ Accept the install defaults to complete the process ④ Launch Google Earth

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II-2. Installing Google EarthChange the language setting/interface of Google Earth

① Launch Google Earth② [ 도구 ] [ 옵션… ] [ 일반 ] [ 언어 설정 ] [English (US)] [ 확인 ]③ Select [Tools] [Options…] [General] [Language settings]

[ English (US)] [OK] ④ Restart Google Earth

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III. USING QGIS

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III-1. QGIS GUI

① Menu bar

② Tool bar

③ Layer List

④ Map View

⑤ Overview

⑥ Status bar

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III-2. QGIS ToolbarCustomizing toolbar

Right-click on empty gray part of TOOLBAR area

Click on the TOOLBAR handle (gray dots on left edge) to enable MOVE control

Drag the TOOLBAR handle to any open space on TOOLBAR AREA and let go

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III-3. Working with Vector DataAdding vector data

• Click [Layer] [Add Vector Layer…]• Browse to the “C:\WorldMap\vector” folder and select all files that

ends “*.shp“• Notice that the Source Type will default to SYSTEM encoding.

– QGIS is VERY good at handling various character set encodings (such as multi-byte Chinese & Japanese, or UTF-8)!

• Click [open] button to add the selected layers to the current project.

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III-3. Working with Vector DataExploring maps

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Pan Map

Zoom In

Zoom Out

Zoom Full

Zoom To Selection

Zoom To Layer

III-3. Working with Vector DataIdentifying features

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Identify Features

III-3. Working with Vector DataSelecting features & opening attribute tables

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Identify

III-3. Working with Vector DataStyling point layers

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III-3. Working with Vector DataStyling line layers

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III-3. Working with Vector DataStyling polygon layers

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III-3. Working with Vector DataLabeling layers

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III-4. Working with Raster DataAdding raster data

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• Click [Layer] [Add Raster Layer…]• Browse to the “C:\WorldMap” folder and select the filename that

ends “ALPSMW274822845_ortho.tif“• Click [open] button to add the selected layers to the current

project.

III-4. Working with Raster DataStyling raster layer

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<Style> <Transparency>

IV. EXTENDING QGIS

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IV-1. QGIS PluginsInstalling QGIS plugins

① Click [Plugins] [Manage and Install Plugins…] menu② Select [OpenLayers Plugin]③ Click [Install] button

Manual Installation① Copy [C:\WorldMap\plugin\openlayers_plugin.zip] file to [C:\Users\[your login

name]\.qgis2\python\plugins] folder② unzip files and restart QGIS

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IV-1. QGIS PluginsHow to use OpenLayers Plugin

① Click [Plugins] [OpenLayers Plugin] menu② Select [Add Google Satellite layer]③ Select vector layer and click [Zoom to Layer Extent]

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V. EDITING GLOBAL MAP DATA

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V-1. Setting EnvironmentSetting the Snapping Tolerance and Search Radius

① Click [Settings] [Options…] menu② Select Digitizing tab③ Set snapping environment: Default snap mode

To vertex and segment

Default snapping tolerance 10.0 pixels

Default radius for vertex edits 10.0 pixels

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V-2. Digitizing ToolbarVector layer basic editing toolbar

Tips: Panning the map during digitizing is possible with the arrow keys or mouse wheel or space bar + mouse

1. Current Edits

2. Toggle Editing

3. Save Layer Edits

4. Add Feature

5. Move Feature(s)

6. Node Tool

7. Delete Selected Features

8. Cut Features

9. Copy Features

10. Paste Features

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V-3. Digitizing an Existing Layer

Editing layers

① Select the target layer you want to edit② Click button from the digitizing toolbar③ Click button to add feature④ Start digitizing on the map⑤ To finish digitizing, right-click anywhere on the

map⑥ Enter the attributes for the new feature⑦ Click button to save edits.⑧ Click button to stop editing

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V-3. Digitizing an Existing Layer

Editing polygon layer - inwatera kor

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V-3. Digitizing an Existing Layer

Editing line layer - roadl kor

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V-4. Creating a New LayerCreating and Editing Shapefiles

① Click [Layer] [New] [New Shapefile Layer…] menu② Select Polygon Type and set WGS 84 CRS③ Enter “Name” by manually typing in the Name textbox④ Click [Add to attributes list] button⑤ Click OK button and specify new layer name

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VI. IMPORT & EXPORT

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VI-1. ImportImport CSV File 1

① Click [Layer] [Add Delimited Text Layer…]② Select the CSV file from [C:\WorldMap\ events.csv]③ Check X, Y fields

X = LON Y = LAT

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VI-1. ImportImport CSV File 2

① Click OK and Select Coordinate Reference System② Right-click on the layer to Open the Attribute Table, and make sure

the tabular data was imported

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VI-2. Export to ShapefileExport to ESRI Shape file

① Select [events] layer② Right-click and select [Save As…] menu③ Options

CRS transformation Encoding

④ Click OK

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VI-2. Export to OGC GML for-mat

OGC GML: XML grammar for expressing geographical features

① Add [roadl kor] layer from shapefiles and select layer② Right-click and select [Save As…] menu③ Select UTF-8 Encoding

Default xml encoding

④ Click OK

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VI-2. Export to KML formatExport to Google Earth KML format

① Add [roadl kor] layer from shapefiles and select layer② Right-click and select [Save As…] menu③ Select WGS 84 CRS④ Click OK⑤ Go to [Windows Explorer] and double click kml file

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Q & A

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•QGIS Home: http://www.qgis.org •QGIS Online Manuals: http://www.qgis.org/en/documentation/manuals.html

•QGIS Workshop : http://maps.cga.harvard.edu/qgis/•UC Davis QGIS Lab: http://www.plantsciences.ucdavis.edu/plant/qgislabs.htm

•Scratching Surfaces : http://www.surfaces.co.il/?p=872•Nathans QGIS Blog: http://woostuff.wordpress.com/•Spatial Galaxy : http://spatialgalaxy.net/

Reference

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THANK YOU!

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