thuc hanh network
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LP O TO CHUYN VIN NG DNG GISCBGD: ThS. Phm Bch Vit KS. Nguyn Hu Nht **KHU CNG NGH PHN MM - HQG. TP.HCMTRUNG TM A TIN HCTHC HNH NETWORKEmail: [email protected]: 0908.527.231
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NI DUNGGII THIEU CAC THANH PHAN NETWORK ANALYST TRONG ARCGIS
BAI TAP THC HANHTAO NETWORK DATASET THC HIEN PHAN TCH NETWORK
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GII THIEU CAC THANH PHAN NETWORK ANALYST TRONG ARCGIS
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Thanh cng c Network Analyst (ArcMap) Kch hot thanh phan m rong Network Analyst trong ArcMap
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**Hin th Toolbar Network Analyst:
Menu View Toolbars Network Analyst
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**Chc nng ca cc nt:
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Thanh xo Network Analyst gm:
New Route: to mi l trnhNew Service Area: to mi khu vc dch vNew Closest Facility: to mi tin ch gn nhtNew OD Cost Matrix: to mi ma trn chi ph ngun chNew Vehicle Routing Problem: to mi cc vn v nh tuyn xe.
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2. Ca s Network Analyst trong ArcMap
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3. B cng c Network Analyst trong ArcToolbox (Tham khao trong tai lieu)
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II. BAI TAP THC HANH
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1. TAO NETWORK DATASET
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5 bc chnh mt to Network Dataset Chun b 1 Feature dataset v ngun d liuTo network dataset trong geodatabse: cc feature class tham gia vo trong mng phi t vo trong cng feature dataset.To network dataset trn shapefile: cc lp tham gia vo trong mng phi t vo trong cng mt th mc.C th cn phi to mi mt feature dataset, feature class v bin tp cc i tng.Chun b ngun d liu tng ng vi cc vai tr trong mng.C cc trng biu din cc gi tr tr khng trong mng: khong cch, thi gian di chuyn,i vi cnh ngun, nu cc gi tr tr khng khc nhau da trn hng di chuyn, n cung cp mt trng ring bit cho mi hng i, v d, FT_Minutes v TF_MinutesTo trng biu din ng mt chiu: One_Way hoc OnewayFT hoc F: ch c di chuyn t im u n im cui theo chiu s ha.TF hoc T: ch c di chuyn t im cui n im u theo chiu s ha.N: khng cho php di chuynCc gi tr khc: di chuyn 2 chiu.
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Chun b lp d liu cho cc im r v thng tin im r.To Network dataset bng thut s New network dataset: thit lp cc thuc tnh cho network dataset: d liu ngun, kt ni, d liu cao, cc im r, nh ngha thuc tnh(chi ph, miu t, hn ch, cp bc) v thit lp bo co dn ngXy dng network dataset: gn cc thuc tnh thit lp cho cc thnh phn trong mng.
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Bi 1: To mt network dataset da trn d liu shapefile
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Chnh sa kt ni vi cc trng cao (trong trng hp cu v ng hm)
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To m hnh im r trong mng. Mc nh Global Turns c chn(vd: mi im r tri trong mng c tr 15s)
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Xc lp cc thuc tnh cho mng: ng 1 chiu, im r tri, r phi, quay u, l cc tr khng trong mng.
Cc thuc tnh ca mng c dng dn ng.
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Ci t hng dn ch ng cho li xe trong mng
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Thit lp cc thuc tnh ch ng trong mng
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Tm tt kt qu
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H thng nhc xy dng mng chn YES xy dng mng
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Kt qu:
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Bi 2: To mt network dataset da trn d liu GeodatabseRight-click trn Feature dataset Network_Q1NewNetwork dataset
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Nhp tn cho network dataset
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Chn cc feature class tham gia vo network dataset
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Thit lp m hnh kt ni cho mng. Click Connectivity thit lp hoc c th thit lp sau khi to network dataset.
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No: thit lp kt ni b qua trng caoYes: thit lp kt ni xt n trng cao
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To m hnh im r trong mng.
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Xc lp thuc tnh cho network dataset
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Chn Yes v click Directions to lp bng ch dn l trnh
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Source TimDuong Name = TenDuongSource DuongDayTT Name = TenDD
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Tm tt kt qu
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La chn xy dng network dataset sau khi to.
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Kt qu:
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2. THC HiN PHN TCH MNG
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Tm l trnh ngn nht Hin th d liu trong ArcMap
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Hin th thanh cng c Network Analyst v ca s Network Analyst
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To mi lp phn tch l trnh (Route)
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Thm cc trm dng (Stop)Chn lp Route v chn Stops(0) trong ca s Network Analyst
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Chn cng c Create Network Location Tool: Click trn lp TimDuong cc trm dng theo mun
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Thit lp cc tham s phn tch:
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Tin hnh thc thi:Hin th bng ch dn
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Bng ch dn:
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Thm chng ngi vt, ro chn (Barriers)
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Thc thi: Lu kt qu:
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