Netlogo 使用.shp文件中的开始和结束节点创建和命名链接
.shp文件的属性表具有以下格式：Netlogo 使用.shp文件中的开始和结束节点创建和命名链接,netlogo,Netlogo,.shp文件的属性表具有以下格式： street_name start_node end_node street_1 A B street_1 B C street_2 B D 如何使用开始节点和结束节点创建链接，然后为每个链接指定与其开始节点和结束节点关联的街道名称。例如，具有起始节点A和结束节点B的链接应获得名称“street_1”，而具有起始节点B和结束节点D的街道应获得名称“street_2” 我
street_name start_node end_node
street_1 A B
street_1 B C
street_2 B D
gis:feature list offoreach gis:feature-list-of roads-dataset [ vector-feature ->
foreach gis:vertex-lists-of vector-feature [ vertex ->
let previous-turtle nobody
foreach vertex [point ->
let location gis:location-of point
if not empty? location
[
let x item 0 location
let y item 1 location
let current-node one-of (turtles-on patch x y) with [ xcor = x and ycor = y ]
if current-node = nobody [
create-nodes 1 [
setxy x y
set size 0.2
set shape "circle"
set color black
set hidden? true
set name gis:property-value vector-feature "name1"
set current-node self
]
]
ask current-node [
if is-turtle? previous-turtle [
create-link-with previous-turtle
]
set previous-turtle self
]
]
]
]
]
你是说你的节点现在在你的模型中被正确命名了吗？如果是这样的话，这里有一个简化版的方法，可能对你有用。我会注意到，这不是一种非常有效的方法，因为它会在链接和属性表之间循环，所以如果有很多链接，则需要一段时间。首先，由于我没有您的shapefile，我制作了一个版本的链接示例：
extensions [csv]
globals [ whole-file ]
turtles-own [ node ]
links-own [ name ]
to setup
ca
reset-ticks
let names [ "A" "B" "C" "D" ]
let n 0
crt 4 [
setxy random 30 - 15 random 30 - 15
set node item n names
set n n + 1
]
ask turtles with [ node = "A" ] [
create-links-to turtles with [node = "B" ]
]
ask turtles with [ node = "B" ] [
create-links-to turtles with [ node = "C" or node = "D" ]
]
end
street_name start_node end_node
1 street_1 A B
2 street_1 B C
3 street_2 B D
end1end2两端将以随机顺序提取它们），并将它们与表中的每个开始节点
和结束节点
组合进行比较。如果匹配，则将该行的街道名称
指定给匹配的链接：
to link-name
set whole-file csv:from-file "node_example.csv"
foreach sort links [
[ i ] ->
show i
let way-1 list ( [node] of [end1] of i ) ( [node] of [end2] of i )
let way-2 list ( [node] of [end2] of i ) ( [node] of [end1] of i )
foreach whole-file [
[j] ->
if sublist j 2 4 = way-1 or sublist j 2 4 = way-2 [
ask i [
set name item 1 j
]
]
]
]
ask links [
print name
print (word [node] of end1 [node] of end2 )
]
end
显然，这是基于在模型中命名的节点（在本例中，使用的变量是node
）-如果不是这种情况，这将不起作用
编辑1
好的，我用你的形状文件玩了一会儿。这还不完美，我暂时不能再做了，但也许它会让你开始。使用此设置：
extensions [gis]
breed [ nodes node ]
globals [ roads-dataset ]
turtles-own [ name line-start line-end]
links-own [ lname ]
我的想法是将起点和终点节点名称指定给线要素沿线的每个点，以便链接可以对照要素列表进行检查。注释中有更具体的注释，但我基本上修改了gis要素节点代码来实现这一点。玩一玩（运行需要一段时间），你会发现有一些差距我还没有完全弄清楚-也许你可以取得进展
to gis-feature-node
set roads-dataset gis:load-dataset "road_links.shp"
foreach gis:feature-list-of roads-dataset [ vector-feature ->
; First, grab the names of the starting and ending node for the current
; vector feature in order to assign common names to all nodes within
; the feature
let first-vertex gis:property-value vector-feature "startNode"
let last-vertex gis:property-value vector-feature "endNode"
foreach gis:vertex-lists-of vector-feature [ vertex ->
let previous-turtle nobody
foreach vertex [ point ->
let location gis:location-of point
if not empty? location
[
let x item 0 location
let y item 1 location
let current-node one-of (turtles-on patch x y) with [ xcor = x and ycor = y ]
if current-node = nobody [
create-nodes 1 [
setxy x y
set size 0.05
set shape "circle"
set color white
set hidden? false
set name gis:property-value vector-feature "name1"
; Here you assign the first-vertex and last-vertex of the entire line
; to each node
set line-start first-vertex
set line-end last-vertex
set current-node self
]
]
ask current-node [
if is-turtle? previous-turtle [
create-link-with previous-turtle
]
set previous-turtle self
]
]
]
]
]
ask links [
;; Here is a major slowdown- reiterate through the entire roads-dataset
; and, if the names in "startNode" and "endNode" match, assign the
; value from "name1" to the link currently being created.
let way-1 list [line-start] of end1 [line-end] of end2
let way-2 list [line-end] of end1 [line-start] of end2
foreach gis:feature-list-of roads-dataset [ vector-feature-sub ->
let vector-start gis:property-value vector-feature-sub "startNode"
let vector-end gis:property-value vector-feature-sub "endNode"
let start-end list vector-start vector-end
if way-1 = start-end or way-2 = start-end [
set lname gis:property-value vector-feature-sub "name1"
]
]
]
ask links with [ lname = "Hamilton Place" ] [
set color red
set thickness 0.2
]
ask links with [ lname = "Whitcomb Street" ] [
set color yellow
set thickness 0.2
]
end
编辑2
下面的代码已经过测试，可以解决问题了
ask links [
set is-road? true
;; Here is a major slowdown- reiterate through the entire roads-dataset
; and, if the names in "startNode" and "endNode" match, assign the
; value from "name1" to the link currently being created.
let way-1 list [line-start] of end1 [line-end] of end2
let way-2 list [line-end] of end1 [line-start] of end2
let way-3 list [ line-start ] of end1 [ line-end ] of end1
let way-4 list [ line-start ] of end2 [ line-end ] of end2
foreach gis:feature-list-of roads-dataset [ vector-feature-sub ->
let vector-start gis:property-value vector-feature-sub "startNode"
let vector-end gis:property-value vector-feature-sub "endNode"
let start-end list vector-start vector-end
let end-start list vector-end vector-start
if way-1 = start-end or way-2 = start-end or way-3 = start-end or way-4 = start-end [
set lname gis:property-value vector-feature-sub "name1"
]
]
]
我编辑了我的帖子，还上传了.shp和其他相关文件，这些文件可以从这个共享的Ok第二轮中访问！看一看，看看这是否有助于你打赌！我肯定地发现它跳过了一些片段，而我现在还没有时间去弄清楚原因——但肯定地是（至少对我来说）它在~6000个链接中丢失了大约1800个链接。也许通过一些调整它会完全工作。。。祝你好运我来看看。我刚刚检查了一下，确实有2358个链接lname=0
。但是谢谢你的开始。这是一种展示我想要的结果的方式。你可以打赌，如果你最终完全弄明白了，我很想听听你是如何做到的。干杯