exercise 4a point to nearest point - paul raschky 4.pdfexercise 4a point to nearest point: 1. from...
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![Page 1: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/1.jpg)
Exercise4APointtonearestpoint:
1. FromfolderExercise4load-AfricanCountries-Landing_Stations-Cables
2. CheckCRS
3. CalculateCentroids
Vector|GeometryTools|PolygonCentroids
![Page 2: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/2.jpg)
4. SavenewLayerasAfrican_centroids
5. Usethe“Distancetonearesthub”tooltofindthenearestpointonthenearestlandingstation.Processing|Searchfor“Distancetonearesthub”
![Page 3: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/3.jpg)
6. Thiscreatesthenewlayer“Hubdistance”
![Page 4: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/4.jpg)
7. ChecktheattributeTableofHubDistance.Doesitcontainalltheinformationweneed?
8. UsetheNNjoinplugin
9. Checktheattributetable.
![Page 5: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/5.jpg)
DIYExercise4BDistanceMatrix:
1. FromfolderExercise4load-KEN_adm2
2. GenerateCentroids
3. SaveCentroidLayer
4. CalculateDistanceMatrix
Vector|AnalysisTools|DistanceMatrixNote(Distanceisindegrees)Youcouldmultiplydistanceindegreesby111.Thisistheconversionratebetweendegreesandkilometresattheequator.
![Page 6: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/6.jpg)
Exercise4CPointtonearestpolyline:
1. FromfolderExercise4load-AfricanCountries-10mcoastline
2. ConvertCoastlinepolylinestopoints.Processing|Searchfor“Convertlinestopoints
3. UseDistancetoHubtool
![Page 7: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/7.jpg)
4. Weonlyneedthepointsonthecoastthatarethenearesttotherespectivecountry’scapital.RunaSpatialQuery
![Page 8: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/8.jpg)
5. Zoomin
6. Saveas“Africa_coast_nearest”Saveonlyselectedfeatures
7. Addcoordinatesofeachpoint(requiredifyouwanttocalculatedistancetoSlaveTradecenterslateron,instata?)Vector|GeometryTools|Export/AddGeometryTools
8. UseNNjointojoininformationfromthecountry_centroids
![Page 9: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/9.jpg)
9. Savelayer.
![Page 10: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/10.jpg)
Exercise4DBuffer:
1. FromfolderExercise4load-KenyaSchools
2. ChangeCRStoprojectedCRSWGS1984/UTM36NFindfittingUTMzoneforyourareaherehttp://www.dmap.co.uk/utmworld.htmSaveLayerandChangeCRSChangeCRSoftheProjectaswell
3. Vector|GeoprocessingTools|FixedDistanceBuffer
Create1Bufferwitharadiusof300andonewitharadiusof1000(inmeters)
![Page 11: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/11.jpg)
![Page 12: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/12.jpg)
Exercise4eMapAlgebra–CalculatingRuggedness:TherearemanydifferenteTerrainruggednessmeasures.http://gis4geomorphology.com/roughness-topographic-position/ForthisexercisewearegongtocalculatetheRelativeTopographicPositionRTP=(DEMmean–DEMmin)/(DEMmax-DEMmin)
1. FromfolderExercise4load-rasterKenyaDEM-vectorKEN_adm2
2. CalculateFocalstatisticsusingtheprocessingtoolr.neighbours
Processing|searchfor“r.neighbours”
Calculate3newrasterKenyaDEM_min,KenyaDEM_max,KenyaDEM_mean
![Page 13: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/13.jpg)
3. UsetheRasterCalculatortocalculatetheRTP
![Page 14: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/14.jpg)
4F.ViewshedAnalysis(PreliminaryBetaversion)Goal:IdentifyAreaswithmobilephonecoverage.CombineinformationaboutthelocationofTelecommtowers,theirrangeandtheirheightwithDEMinaviewshedanalysis:
Source:http://mapaspects.org/
1. FromfolderExercise4load-rasterKenyaDEM-vectorKenya_Comms_Tower
2. ChangeProjectiontoWGS84/UTMN36
3. CreateBufferwith50kmradius
![Page 15: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/15.jpg)
4. InstallPlugin“ViewshedAnalysis”5. Plugins|ViewshedAnalysis|ViewshedAnalysis6. Chooseobserverheightandsearchradius
![Page 16: Exercise 4A Point to nearest point - Paul Raschky 4.pdfExercise 4A Point to nearest point: 1. From folder Exercise 4 load - African Countries - Landing_Stations - Cables 2. Check CRS](https://reader033.vdocuments.us/reader033/viewer/2022060518/604c40d98c138f53fb65eb84/html5/thumbnails/16.jpg)
7. Newoutputisraster.
8. Convertrastertovector.Raster|Conversion|Polygonize