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Play with Vector and Make Map
- 1. Center for Research and Application for Satellite Remote Sensing Yamaguchi University Play with Vector and Make Map
- 3. Download and install: https://qgis.org/en/site/ QGIS Installation
- 4. • Setting → option → general → English Change language
- 5. Google Maps: https://mt1.google.com/vt/lyrs=r&x={x}&y={y}&z={z} Google Satellite: http://www.google.cn/maps/vt?lyrs=s@189&gl=cn&x={x}&y={y}&z={z} https://geogeek.xyz/how-to-add-google-maps-layers-in-qgis-3.html Add google earth and others in QGIS
- 7. • DIVA-GIS provides free geographic data such as administrative areas, inland water, roads, railroads, elevation and land cover • http://www.diva-gis.org/gdata Subject Description Source Format Resolutio n Administrative areas (boundaries) Country outlines and administrative subdivisions for all countries. The level of subdivision varies between countries GADM, version 1.0 Vector (area) - Inland water Rivers, canals, and lakes. Seperate files for line and area features Digital Chart of the World Vector (line and area) - Roads Roads Digital Chart of the World Vector (line) - Railroads Railroads Digital Chart of the World Vector (line) - Elevation SRTM30 dataset. CGIAR-SRTM data aggregated to 30 seconds CGIAR SRTM (3 seconds resolution) Grid 30 seconds Land cover Land cover, original data resampled onto a 30 seconds grid GLC2000 Grid 30 seconds Population Population density (old) CIESIN, 2000. Global gridded population database Grid 30 seconds Climate Monthly climate data WorldClim Grid 30 seconds Gazetteer A gazetteer is a list of place names and their coordinates. The files you can download here are for use in DIVA for automatic georeferencing (to assign coordinates to places). The files should be placed in the gazet directory. (old, use Biogeomancer). They can also be used to map localities, however you can download more recent files from NIMA U.S. National Imagery and Mapping Agency's (NIMA) database of foreign geographic feature names DBF - Global shapefile
- 8. • Global Map Japan was developed by Geospatial Information Authority of Japan(GSI). • Download: http://www.gsi.go.jp/kankyochiri/gm_japan_e.html Japan shapefile
- 10. World : • Country boundary ( ne_50m_admin_0_countries.shp ) (Vector) • Global land-use ( gm_lc_v1.tif ) (Raster) Japan : • Japan shapefile ( polbnda_jpn.shp ) Stats : • Population.csv Input data for this workshop Data: http://bit.do/workshop-yu
- 11. Open QGIS and check their coordinate systems - Vector – world countries boundary - Raster – MODIS temperature or global landuse WGS84 EPSG:4326 Check coordinate systems
- 12. World Azimuthal Equidistant EPSG:54032 Sphere_Eckert_IV EPSG:53012 ETRS89 / EPSG Arctic zone 2-22 EPSG:6069 Data source CRS Project CRS “On the fly” reprojection Coordinate Reference System ( CRS )
- 13. • World Azimuthal Equidistant EPSG:54032 Let’s check each different CRS
- 14. • Sphere_Eckert_IV EPSG:53012 Let’s check each different CRS
- 15. • ETRS89 / EPSG Arctic zone 2-22 EPSG:6069 Let’s check each different CRS
- 16. Projected Coordinate System: UTM Zone
- 17. Create maps for Japan
- 18. Global map japan → WGS84 Check administrative shapefile and its reference
- 20. Change color by prefecture names
- 21. • Dissolve Takes a vector layer and combines its features into new features. One or more attributes can be specified to dissolve features belonging to the same class (having the same value for the specified attributes), alternatively all features can be dissolved into a single one. Dissolve function
- 22. District to prefecture by dissolve function
- 23. District to prefecture by dissolve function
- 24. Check the dissolved result
- 25. Please check other useful - Buffer - Union - Eliminate https://docs.qgis.org/3.4/en/docs/user_manual/processing_algs/qgis/vectoroverlay.html#qgissymmetricaldifference Other processing
- 26. https://docs.qgis.org/3.4/en/docs/user_manual/processing_algs/qgis/vectoroverlay.html#qgissymmetricaldifference Clip Intersection Difference Symmetric difference Vector overlay
- 27. Statistical data is provided in folder csv Scale 1:1000 person Statistical data (in CSV file)
- 28. • Check attribute table Prefecture boundary (Shapefile)
- 29. Field name: nam Column name: name Prefecture have to be same names Join attribute table
- 30. • Allow for editing • Open field calculator left("nam", strpos("nam", ' ')) Remove “ken” from “nam” field in shapfile
- 31. Result of new prefecture names
- 32. Join attribute: add CSV to QGIS
- 33. Join attribute table in layer properties
- 34. Shapefile attribute table CSV Joined table result
- 35. • First export joined table shapefile Edit attribute table
- 36. • Select the shapefile that you want to edit table • Allow toggle editing • Right check on that shapefile and open attribute table • Directly type some loss values (Okinawa row) and save change Edit attribute table
- 37. y2015 M2015 F2015 0_14 15_64 over 75 65_74 5382 2537 2845 608 3191 768 790 1973 973 1000 251 1166 259 281 1434 705 729 247 892 143 135 Hokkaido Gumma Okinawa Key loss values
- 38. Right click on the shapefile → layer properties → Symbology → Graduated Let’s change color
- 39. Equal interval Natural break Numbers of Population by prefectures
- 40. $area → square meters $area / 1000000 → square kilometers Calculate area
- 41. 1 = 1000 person Calculate population density
- 42. You can edit existing field !!!!! persons in square kilometers Calculate population density
- 43. 1:1000 Population vs population density
- 44. Pie chart: male and female population
- 45. Pie chart: male and female population
- 46. Pie chart: male and female population
- 47. Histogram: four groups of ages
- 48. Histogram: four groups of ages
- 51. Design your map