\n| network 1 imported into network 2 (marked added links) all together network makes no sense<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n As we see there’s a lot of confusion.<\/p>\n Solution:<\/b>
\n
\n<\/b>there are two methods: one is scripting, another is via Access DB.
\n<\/b><\/p>\n Scripting is easier and faster and can be automated, but it doesn’t work for many objects (it works for nodes, doesn’t work for links). See examples below(all scripts in python):<\/p>\n a) Bulk (didn’t work with older versions of Visum) – much faster:<\/p>\n def get_Nodes(Attr):
\nreturn Visum.Net.Nodes.GetMultiAttValues(Attr)<\/i>
\n
\n<\/i>Nodes=get_Nodes(“No”)
\nNodes=list(Nodes)
\nNodes=[list(node) for node in Nodes]
\nfor i,node in enumerate(Nodes):
\nnode[1]=i+100000000 #put max node no in your network here<\/p>\n # we need to do it twice: once we add big number to all elements and the we can give them ordered numbers starting from whatever
\nVisum.Net.Nodes.SetMultiAttValues(“No”,Nodes)<\/p>\n Nodes=get_Nodes(“No”)
\nNodes=list(Nodes)
\nNodes=[list(node) for node in Nodes]
\nfor i,node in enumerate(Nodes):
\nnode[1]=i+1000000 #give your threshold here (nodes will start fron No=1000000<\/p>\n Visum.Net.Nodes.SetMultiAttValues(“No”,Nodes)<\/i><\/p>\n b) element by element – can be very slow:<\/p>\n Nodes=Visum.Net.Nodes.GetMultiAttValues(“No”)
\nNodes=[node[1] for node in Nodes]
\nfor node in Nodes:
\nVisum.Net.Nodes.ItemByKey(node).SetAttValue(“No”,node+<\/i>\u00a0100000000\u00a0<\/i>)
\ni+=1
\nfor node in Nodes:
\nVisum.Net.Nodes.ItemByKey(node+<\/i>\u00a0100000000<\/i>\u00a0).SetAttValue(“No”,i)<\/i>
\ni+=1<\/i><\/p>\n 2) Access DataBase:
\nI’m not ver familiar with Access so just a picture of what I do:
\na) Export network into Access DB (can take a lot of time)
\nb) Open access file and edit tables
\nc) Change keys in tables (for links it’s good to change name of “No” column into anything else and create additional column named No, then set this column as a key.
\nd) make the new column “Autoincrement” – so the number will be integers starting from 1
\n(for links it needs to be different, links have directed numbers so it shall be like this:\u00a01 1 2 2 3 3 4 4 5 5 6 6 … –\u00a0<\/i>I did it in excel and pasted.
\ne) you save the file and Import it into Visum<\/p>\n This way we merged four different shapefiles with overlapping numbers and two different Visum networks.
\nEverything is neatly numbered starting from one onwards.<\/p>\n PS. We came across another issue which seemed strange but we found very easy explanation. During import we got following message that node number exceeds: 2 147 483 648. Which happened to be max of LongInt datatype, so actually that’s the limit of Visum \ud83d\ude42 You cannot go any further. Simply reduce umbers by means of the solutions above.<\/p>\n Hope it helps!<\/p>\n","protected":false},"excerpt":{"rendered":" I believe anyone who has created once Visum network out of big extrenal datasets (mainly GIS – .shp) came across problems with numbering duplicates. Here… <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[],"class_list":["post-186","post","type-post","status-publish","format-standard","hentry","category-visum"],"_links":{"self":[{"href":"https:\/\/zhuoyao.net\/index.php\/wp-json\/wp\/v2\/posts\/186","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zhuoyao.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zhuoyao.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zhuoyao.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zhuoyao.net\/index.php\/wp-json\/wp\/v2\/comments?post=186"}],"version-history":[{"count":0,"href":"https:\/\/zhuoyao.net\/index.php\/wp-json\/wp\/v2\/posts\/186\/revisions"}],"wp:attachment":[{"href":"https:\/\/zhuoyao.net\/index.php\/wp-json\/wp\/v2\/media?parent=186"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zhuoyao.net\/index.php\/wp-json\/wp\/v2\/categories?post=186"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zhuoyao.net\/index.php\/wp-json\/wp\/v2\/tags?post=186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} |
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<\/a><\/td>\n<\/tr>\n