Also known as a "nodes", the points specifically used to describe a polygon or polyline in a "vector" or "linestring" representation.

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21
votes
4answers
6k views

Difference between node and vertex in GIS?

In graph theory the term of node and vertex are equivalent, but sometimes in the GIS world the nodes and vertex are mentioned in the same context. I was wondering what the difference is? Node: can ...
16
votes
8answers
29k views

Extracting coordinates of polygon vertices in ArcMap?

I've got about a dozen polygons in a feature class loaded in ArcMap 10, all in geographic WGS 1984. How do I easily obtain the coordinates associated with each vertex of each polygon in that feature ...
11
votes
6answers
5k views

How to find the boundary co-ordinates from a given set of co-ordinates

Given a set of coordinates, How do we find the boundary coordinates. <== Figure 1 Given the coordinates in the above set, How can I get the coordinates on the red boundary. Boundary is the polygon ...
7
votes
3answers
2k views

Order of polygon vertices in general GIS: clockwise or counterclockwise

Two days ago I asked a question about the internal storing order for the vertices of a polygon in ESRI shapefiles. That question was answered (Are polygons stored clockwise or counterclockwise in a ...
7
votes
2answers
65 views

Tool that modifies number of vertices but not the feature itself

Do you know the reason, why some ArcGIS tools (like Clip and Intersect) modifies number of vertices, even if the feature is not modified itself? Like on the picture, I use Clip and Intersect on line ...
6
votes
3answers
3k views

Deleting multiple vertices at once from representations using ArcGIS Desktop?

I have a polygon feature class that I've converted to representations so that I can delete some vertices. I'm doing this to simplify some of the shapes manually, but I'd like to speed this up by ...
6
votes
4answers
5k views

View vertices in ArcGIS

In ArcGIS, is it possible to change the polyline symbology to show vertices? Or do I need to extract the points via Feature Vertices To Points? This becomes a pain if I want to edit the source ...
5
votes
2answers
130 views

Find lower left corner of a rotated polygon

I am currently struggling with a mathematical problem and can't seem to get it solved. I have a bunch of rotated rectangular polygons (solution should also work for non-rectangular polygons) in ...
5
votes
3answers
3k views

How tool to split polylines into two-part lines at vertices in ArcGIS for Desktop 10.1?

I'm using ArcGIS 10.1 SP1 at and we have a problem. There is a serious topology bug that I've mentioned in another question that is affecting our workflow. At present, Esri has stated the fix will be ...
5
votes
1answer
470 views

New Snapping while editing vertex's in ArcEngine 10

Is it possible to use the new (not classic) snapping functionality when editing the vertices of a polygon feature in ArcEngine 10. I would like editing vertices to behave exactly the same as editing ...
4
votes
2answers
75 views

How to display vertex markers in QGIS for non-editable layers?

I've a PostGIS layer with read-only privileges. Is there any way to display the vertex markers of the layer?
4
votes
2answers
127 views

How to extract nodes with PostGIS to a multipoint geometry

I have a line in a PostGIS table test_line. I want to extract it's nodes into a multipoint geometry. I tried the following: SELECT ST_Collect((ST_DumpPoints(the_geom)).geom) FROM test_line; But it ...
4
votes
2answers
592 views

Why is ArcMap editor deleting some added vertices and simplifying polygon?

I am using ArcMap 10.0. I am trying to edit (and add) vertices in a polygon. I start editing, (using "Edit Vertices" tool), and add many vertices in the polygon. Then when I am done, I save the ...
3
votes
3answers
1k views

How to clean up a polygon by removing vertices and lines within?

After merging a set of shapefiles I've ended up with polygons that have vertices and lines within them. Is there a simple tool to remove these vertices and clean the polygon in ArcMap 10.2? I realise ...
3
votes
4answers
11k views

Change number of decimal digits for features in ArcGIS 10?

I am editing vertices in polygons and points in ArcMap 10, and realised that they only hold 3 decimal digits for the X, Y coordinates, but I would like at least 6 decimal digits. Even if I type in ...
3
votes
2answers
58 views

Labeling polyline vertices with Z value using ArcGIS for Desktop?

I would like to label all polyline vertices of a shape with the z value of each vertex without using export tools like Entity Vertices to Point and without creating new field in the attribute table
3
votes
5answers
2k views

How to Identify and Delete duplicate vertices?

I am trying to figure out how to delete duplicate vertices. I have successfully determined that there are duplicate vertices using PLTS Data Reviewer, but I am confounded as to how I identify and ...
3
votes
2answers
105 views

Deleting line vertices inside polygon using ArcPy?

Is there a way to automatically delete vertices in line features using a polygon file in ArcGIS so that it wouldn't cut up the line but just straightens the line inside the polygon? The lines are ...
3
votes
2answers
1k views

Converting Vertices of Polylines and Polygons to Points and Maintain Attributes

I'm pretty sure someone has done this before, but I'm having no luck. I'm using ArcGIS Standard version 10.2.1 and I want to convert all the vertices of a polyline or polygon to points. Essentially, ...
3
votes
4answers
2k views

How to remove vertices or lines within a polygon?

I have transformed a *.dxf-file into a polygon shape-file. In many of the polygons i have lines whicht do not belong there but i can not delete them as i normally delete vertices on polygons by ...
3
votes
3answers
2k views

How to select the vertices from a polygon?

I am writing some VBA code to extract vertices from a polygon. I would like to ask, how to select the vertices from a polygon ? Regards Gary
3
votes
3answers
457 views

How do I draw smooth vertexes around curves in ArcMap 10+?

I have some polygon layers (parcels) that have vertexes drawn around curves, as if traced. How do I click and drag to draw vertexes in a smooth shape? Big difference between what was originally there, ...
3
votes
1answer
730 views

Pivot a polyline at vertex or distance using ArcObjects C#

I hope you can help me with that one. I'm using ArcObjects with C# trying to rotate only one part of a polyline at a vertex or distance along the polyline. The polyline is zAware and has values at ...
3
votes
2answers
73 views

Breaking connecting between features (Editor tool)

I snapped a series of lines to a point (The ? symbol on the picture). Now, I am trying to unsnap them so I can connect them to their respective line I just created. My question is simple. How do I ...
2
votes
2answers
65 views

Modifying vertices x,y values to remove all value from 3rd decimal in ArcMap?

I want to check whether there is a way to update the vertices x, y value and remove all values from the 3rd decimal. I only want 2 decimals (no matter the 3rd decimal is 0 or 9, just remove it). The ...
2
votes
1answer
2k views

Is there a function or tool that will add vertices to polylines where endpoints are snapped to edges? (ArcMap)

My friend and I are creating a walking network, and we have been having issues getting the routing to work. We just realized that the reason why our routes are messed up is because we snapped our ...
2
votes
2answers
101 views

How to add a perpendicular line to the start & end nodes of every polyline? [duplicate]

Is there a way to add a perpendicular line to the end node of each polyline? Something like this:
2
votes
1answer
228 views

Why does ArcMap edit session show different vertex count on feature than arcpy/ ArcToolbox

I am looking at features in an ArcSDE geodatabase via ArcMap. The feature shows to have four vertices by viewing the vertices in the map and by looking at the sketch properties. However if I run a ...
2
votes
1answer
820 views

Snapping Polygon vertices to Point features using ArcGIS?

I have a set of polygons drawn using an inaccurate GPS PDA. these polygons are sharing nodes. After post-processing GPS data to get accurate coordinates i have a set of all the nodes, then i have to ...
2
votes
2answers
24 views

PyGIS remove QgisVertexMarker from scene

I am writing a plugin that includes interaction with the map. Therefore I use a QgsMapTool. It is possible for a user to mark a point on the map. When the user clicks a red X is drawn on the mapCanvas ...
2
votes
1answer
320 views

Extract number of vertices in each polygon in R

Simple question: how to extract the number of vertices in each polygon in R? I've found one way that works, but this is very slow (when x is a SpatialPolygonsDataFrame): y <- fortify(x) n.verts ...
2
votes
1answer
349 views

Evaluate minimum points required to define polygons based on an error threshold

I need to build a model or write an algorithm to do this, which I would like you to share your ideas with me. here is my cadastral problem: I have plenty of polygons and I need to make a report of ...
2
votes
0answers
12 views

Geocode area/neigborhood into polygon vertices

I have been successfully using the Google Maps API using the R package ggmap to find location coordinates for e.g. addresses or city names. However, Google Maps now shows areas as well, indicating ...
2
votes
1answer
338 views

Polyline ZM: automatic vertex height errors correction

Paolo I've got many rivers (polylines ZM) with a lot of height errors in Polylines 'vertices. Vertices' Z errors are not all equal in height (i.e. they are not all at zero height). I must create a TIN ...
1
vote
2answers
636 views

How to remove unnecessary vertices

I have over sampled polygons that I need to simplify, without changing the shape. basically, I want to reduce the number of vertices, by eliminating the ones that are useless and have the polygons ...
1
vote
4answers
629 views

Automatically Remove Duplicate Vertices in a Polyline

I am trying to automatically identify identical vertices within a polyline and remove them without converting the vertices to points first. I have converted the vertices to XY points and identified a ...
1
vote
1answer
383 views

How to split multiple polygon layer into multiple layers by vertices parts?

I have a layer in Arcmap 10 that was brought over from Auto CAD (layer A). This layer has multiple polygon shapes. I need to split these shapes from layer A, and place them into their own layers. ...
1
vote
2answers
412 views

Alternative to ST_ClosestPoint, one which returns a vertex of the geometry

ST_ClosestPoint returns the closest point on a geometry, as in the example at http://postgis.net/docs/ST_ClosestPoint.html What I need is to get the closest point which is already a part of the ...
1
vote
1answer
54 views

Does moving vertexes split them?

When i try to move my vertexes from my line feature in QGIS 2.10, the line is getting "separated", also when i delete the vertexes my line is getting holes. Any ideas why?
1
vote
1answer
87 views

Labeling only line vertices in QGIS?

I want to only put labels on the vertices of the polylines. I can use the data defined features to place a label at specific points, but not at multiple specific points. Is it possible to label only ...
1
vote
1answer
786 views

Insert Vertex into Polyline based on Point layer using arcpy

This is essentially the same question asked here that was not answered... Using ArcGIS 10.1 Advanced I have a point layer with points that represent the intersection of a driveway with a street ...
1
vote
1answer
43 views

Duplicated vertices in contour features of GRASS?

I use GRASS to produce contours from DEM (r.contours for SRTM rasters). They looks fine, but most of the line features occures to be duplicated; i.e. verticies duplicated. Here are pictures of output ...
1
vote
1answer
189 views

Why sometimes Network Analyst can not find the shortest or the best route?

Normally in Network analyst and route detection it has to find the shortest and efficient way.But here in my work I can see that it does not find the best choice.I wonder why it chose the longer path ...
1
vote
1answer
171 views

How can i change vertex option programmatically using python in QGis?

I want to activate the option "Show markers only for selected features" in Setting-> options->vertex markers ,using python. does anyone know if i can do it programmatically ? i attached a photo of the ...
1
vote
1answer
76 views

problem with arcgis Sample : Custom vertex editing commands

please i downloaded this sample : http://help.arcgis.com/en/sdk/10.0/arcobjects_net/conceptualhelp/index.html#/Sample_Custom_vertex_editing_commands/0001000002pz000000/ it's a Dynamic Link Library. ...
1
vote
1answer
158 views

Find the vertices of an ROI in XROI using IDL

I need to find the vertices of an ROI shape created in IDL's XROI, so that I can redraw the ROI on multiple images. I know you can find the centroid, area and perimeter with the GEOMETRY command, but ...
1
vote
1answer
262 views

Problem with Pgrouting 1.5

Hi all and thanks in advance. I have Postgis 2.0.1 and PgRouting latest version. I'm using osm2pgrouting to import OpenStreetMap data everything goes ok the trouble is that I always get source and ...
1
vote
1answer
31 views

Create Polygon with 50'000 vertices

Is there a way to automatically create a new polygon in an existing Feature Class with over 50'000 Vertices? I work with ArcGIS 10.2 and FME. Hints how to create such a polygon within ArcGIS Desktop ...
1
vote
0answers
50 views

Matching vertices in igraph (R)

This is my first question so apologies if it's poorly explained... I'm currently using a combination of ArcMap 10.2 and igraph in R to analyse a network with associated data. I have an igraph ...
1
vote
0answers
48 views

Insert vertices coordinates in polygon [duplicate]

I have a polygon layer. I extracted the coordinates of vertices, and now I need to add these coordinates in each polygon. The final shapefile should have an attribute table as follows: where X1, ...