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Geoprocessing: Vector Analysis
.
Soil Type Bearing Capacity (kN/sq. m.)
Gravel 450
MediumSand 250
Fine Sand 150
SoftClay 100
Steps:1
Openfile toworkwithinArcMap.
In thiscase, openD:/Practical Data/Geographical Analysis(Vector)andselectlanduse,roads,
streamsand soil files streamsandsoil files.
Checkthe attributesof the layersadded  especiallyforlanduse andsoil.
Categorize these layersintodifferentcolorsperfieldtype if needed.(Rightclicklayer-
>properties->categories->selectfieldandshow all values)
1. we needonlybushland.
Selecttool inAnalysistoolsof ArcToolbox.
Give inputas Landuse.shp,giveoutputfilename asbushland.shp.inSql window,give command
LU_type = Bush land
Using'Select' Tool
Bushlanddisplayed
Figure:Bush land separated
Condition:2, site shouldnotbe inhabited.Sincewe alreadyextractedbushlandoutof the map, the same done for
inhabited
Condition:3,the site shouldbe within500mdistance from inhabitedarea.
To get the 500m bufferof inhabitedarea,we needtoseparate inhabitedareafromthe landuse
map first,usingSelecttool asbefore.
Nowwe give LU_TYPE = InhabitedinSQLwindow.
Figure: Inhabited land separated
Afterseparatinginhabitedarea,bufferthe inhabitedareaby500m.
To selectsite within500mbufferof inhabitedarea,use clip tool with:
Inputfile asbushland.shp,Clipfeature asinhabited500.shp andoutputfile asop_clip1.shp
Figure: Op_clip1.shp
Condition 4:our site mustnot be within150m of streams.
For this,we have to bufferstreamsby150m. Then use the erase tool to remove the portionsof
the site (op_clip1.shp) thatintersectswiththe bufferedstreamfile.
To bufferstreamsby150, use buffertool
Figure: streams before buffering
Nowuse the erase tool to remove the portionsof the site within150m bufferof streams:
Figure:op_clip2.shp
Condition 5: the site mustbe within500m of the existingroad.So,we have tobufferroadby 500m and
clipour currentoutputfile op_clip2.shpwiththe bufferedroadfile.
To bufferthe roadby 500m, use buffertool
Thenclipthe outputfile withroadbufferfile withinputfileasop_clip2,andclipfeature asRoad500.shp
Outputfile isnamedasop_clip3.shp
Figure: op_clip3.shp
Condition6:To get siteswithgravel only,we have tofirstseparate gravel fromothersoil typesinthe
map.
Use selecttool forseparating:
Figure:Separating 'gravel' soil type
Nowto getthe portionsof the outputfile whichhave gravel,use cliptool withInputfileas
op_clip3.shpandclipfeature asgravel.shp
Figure:op_clip4.shp
Condition:7, our site should notbe within100m of the road.
To create bufferof road for 100m:
Thenusingerase tool,remove commonportions:
Final op
Figure:final site selected is highlighted in red color

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Lab report 5 vector analysis

  • 1. Geoprocessing: Vector Analysis . Soil Type Bearing Capacity (kN/sq. m.) Gravel 450 MediumSand 250 Fine Sand 150 SoftClay 100 Steps:1 Openfile toworkwithinArcMap. In thiscase, openD:/Practical Data/Geographical Analysis(Vector)andselectlanduse,roads, streamsand soil files streamsandsoil files. Checkthe attributesof the layersadded especiallyforlanduse andsoil. Categorize these layersintodifferentcolorsperfieldtype if needed.(Rightclicklayer- >properties->categories->selectfieldandshow all values) 1. we needonlybushland. Selecttool inAnalysistoolsof ArcToolbox. Give inputas Landuse.shp,giveoutputfilename asbushland.shp.inSql window,give command LU_type = Bush land
  • 3. Condition:2, site shouldnotbe inhabited.Sincewe alreadyextractedbushlandoutof the map, the same done for inhabited Condition:3,the site shouldbe within500mdistance from inhabitedarea. To get the 500m bufferof inhabitedarea,we needtoseparate inhabitedareafromthe landuse map first,usingSelecttool asbefore. Nowwe give LU_TYPE = InhabitedinSQLwindow. Figure: Inhabited land separated
  • 4. Afterseparatinginhabitedarea,bufferthe inhabitedareaby500m. To selectsite within500mbufferof inhabitedarea,use clip tool with: Inputfile asbushland.shp,Clipfeature asinhabited500.shp andoutputfile asop_clip1.shp Figure: Op_clip1.shp Condition 4:our site mustnot be within150m of streams. For this,we have to bufferstreamsby150m. Then use the erase tool to remove the portionsof the site (op_clip1.shp) thatintersectswiththe bufferedstreamfile.
  • 5. To bufferstreamsby150, use buffertool Figure: streams before buffering
  • 6. Nowuse the erase tool to remove the portionsof the site within150m bufferof streams: Figure:op_clip2.shp Condition 5: the site mustbe within500m of the existingroad.So,we have tobufferroadby 500m and clipour currentoutputfile op_clip2.shpwiththe bufferedroadfile. To bufferthe roadby 500m, use buffertool Thenclipthe outputfile withroadbufferfile withinputfileasop_clip2,andclipfeature asRoad500.shp
  • 7. Outputfile isnamedasop_clip3.shp Figure: op_clip3.shp Condition6:To get siteswithgravel only,we have tofirstseparate gravel fromothersoil typesinthe map.
  • 9. Nowto getthe portionsof the outputfile whichhave gravel,use cliptool withInputfileas op_clip3.shpandclipfeature asgravel.shp Figure:op_clip4.shp Condition:7, our site should notbe within100m of the road. To create bufferof road for 100m:
  • 10. Thenusingerase tool,remove commonportions: Final op Figure:final site selected is highlighted in red color