Tagged Questions

Automatic process of moving points or features to match or coincide exactly with coordinates of another feature within a specified distance, or tolerance

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0
votes
0answers
31 views

Is snapping working when changing from NAD83(decimal degree) to NAD83 Zone UTM 11N(meters)?

I've used the following ESRI snippet to Convert the display extents in Pixels (at the current map scale) and then return out the map units. public System.Double ...
0
votes
1answer
36 views

Openlayers snapping the whole figure/feature

is it possible to snap (drag and snap) a feature to another feature in the same layer? I found OpenLayers.Control.Snapping but it's snapping only the points.
2
votes
1answer
38 views

Why does new feature created not snap to existing feature vertices in ArcGIS 10?

I have created a polygon feature earlier then I wanted to create points on the polygon vertices but it won't snap on top of the vertex. I wanted to know the reason why it does not snap and is there ...
0
votes
0answers
40 views

Snapping with mutiple custom tool using diffrent snapping types

I have a custom tool with snapping type is (snapping to point + snapping to edge), and the second tool having snapping type is snapping to point only, so when i select the first tool it works well, ...
3
votes
3answers
49 views

Snapping start- and end nodes of lines to other lines in PostGIS

There are plenty examples that show how to snap lines to points, but I haven't been able to find any (fast!) way of snapping the start- and end nodes of line strings to nodes of other lines. ...
1
vote
0answers
23 views

Uploading Polyline feature in ArcGIS Online [duplicate]

I'm seeing some snapping/topological errors in ArcGIS Online (trial version) when I upload my well snapped polyline layer. Please see the screen shot below. What may be the cause of this?
4
votes
0answers
34 views

Showing snapping error in ArcGIS Online

I am doing some test in ArcGIS online to know how much helpful it is for my firm, But when I opened my road line .Zip shapefile in ArcGIS online it is showing some snapping issues as well as changed ...
13
votes
4answers
217 views

How to implement a “Snap to Road”-functionality?

I am having a problem with a little application I'm trying to develop. What I do is take a phone with me and drive around the city on a bike. I collect all the Latitude/Longitude-pairs and at home I ...
1
vote
2answers
80 views

ArcMap 10.1 point snap: Unable to snap to a point please help!

Very basic question sorry, missing some fundamentals. Outline: I have 4 points as a .shp also converted to .lyr that I brought in as a x/y table and converted. I want to create a polygon as a ...
5
votes
1answer
114 views

How can I snap lines in PostGIS?

I have a few linestrings that together form a long line. The start- and endpoints of the linestrings are equal with their direct neighbour, but when tested the ST_Distance between any 2 lines is like ...
6
votes
3answers
308 views

How to snap lines to points automatically?

I have two vector shapefiles: One file is points representing manholes and the other is a polyline file representing pipes leading to and from the manholes. I need to snap the lines within a ...
7
votes
1answer
146 views

real time map matching

I am working on a project which requires real time map matching. I am currently using ArcGIS but not sure whether it will work. Here is what happens with my system: the cell phones sent GPS fixes ...
1
vote
1answer
111 views

How to fix the “Snap tolerance” error message in QGis?

I am trying to use the "Delete part" tool on a shapefile. While I am starting to use it, an error message shows up : "Could not snap segment. Have you set the tolerance in Settings > Project ...
3
votes
1answer
317 views

How to enable “snapping” in Quantum-GIS while drawing polygons?

I tried to draw polygons in qgis-1.7.0 and I somehow can't find or failed to find the "snapping" option. I'm used to ArcGIS-10.0 where you have some snapping options, like placing points of polygons ...
5
votes
3answers
353 views

How to close multipart polyline gaps in ArcMap

I have a multiple multipart contour lines that originally came from CAD drawing. I converted these into a polyline shapefile in ArcGIS. The issue I have is with gap in each contour lines that are ...
3
votes
1answer
185 views

ArcGIS 10.1 Network Analyst: Snapping stops from point-shapefile to route analysis layer doesn't work properly

I'm struggling with a task, which should be not that difficult....but anyway I do not find a solution. Background I'm map-matching tracks, generated by a GPS-device, to a road network. Therefore I ...
2
votes
1answer
105 views

ArcGIS 10 (SP 3) - Geometric Network - which features are moved?

In ArcGIS 9.3 Geometric Network, you can select which features can be moved when snapping. In ArcGIS 10 (SP 3) this functionality has disappeared and you either choose to have snap tolerance or not. ...
3
votes
3answers
155 views

What is the ArcGIS equivalent to WEED tolerance?

Example: User is digitising new (line, poly) features and accidentally adds additional vertices within very small distance of previous vertex, resulting in redundant vertices. I want to prevent this ...
0
votes
0answers
79 views

Move or snap all annotation created from point layer

Et geo is a very good tool, I got angle from nearest line and i snapped all points to another line buffered with an exact position from the road ( 10 points 1:1500) some manual calculation was needed ...
0
votes
0answers
212 views

Annotation placement, vertical alignment Center, Snap to point

Still in arcgis 10.1 you can not create Annotation from features with Center verticalalignment. The Problem is when we rotate in illustrator the annotations moves wrong. And we can not change to ...
2
votes
1answer
315 views

Snapping lines to points

i have to snap the point the Layer containing point 'A' the layer of point 'B' , but i have a third layer of vector which is a line layer containing 'line 1', so each vector has a point of layer 'A' ...
4
votes
2answers
3k views

snapping polygons and lines

I recently downloaded QGIS on a Mac OSX 10.7.4 (lion) and purchased a master map shape file, of a particular area. I am trying to divide it into polygons following features on the master map vector ...
0
votes
0answers
103 views

Snapping Problem in arcmap view option using .Net

I am trying to do snapping in arcMap at view option. I wrote the following code: IPointSnapper pointSnapper; ISnappingEnvironment snappingEnv; ISnappingFeedback snappingFeedback; ISnappingResult ...
1
vote
1answer
125 views

QGIS - WGS84 to BC Albers reprojection no curved lines, any idea why? How to snap a line to a point?

I am trying to learn a bit about QGIS. So I thought I would drop in some layers of my Province and then recreate some points representing the BC Albers Central Meridian, and the two standard ...
5
votes
2answers
196 views

3D snapping in open source platforms

I'm looking for tools and extensions in open source platforms (gvSIG, QGIS, uDig, etc) that allows 3D snapping. In the last years, most of the projects my company is working on required the editing ...
0
votes
0answers
76 views

Why is the layer list in the Snapping Settings dialog empty?

I am using ArcGIS Engine and would like to display snap settings to the user. I'm using the Snapping Settings dialog (esriControls.ControlsEditingSnappingCommand) to provide the ability to choose ...
6
votes
5answers
2k views

Why won't ArcMap 10 snap?

I'm really confused by this. ArcMap will seeminly randomly decide to not allow snapping when editing. Sometimes its only for certain features, sometimes for only parts of the same feature (e.g. one ...
2
votes
0answers
138 views

Get Feature that was snapped to in New Snapping Environment

I asked this over at the ESRI forums but lack of activity over there made me post here as well. Does anyone know if there is a way to get the feature that something was just snapped to in the ...
4
votes
1answer
556 views

Is there a way to automatically snap loose points of lines to close by vertices with Quantum GIS?

I have a vector layer of lines that were drawn with the snapping option off. I need to have them snapped but, there are hundreds of lines. Is there any solution to do this automatically or ...
2
votes
3answers
709 views

ERROR 000800 when trying to snap points layer to line or buffer layer

I am very new to GIS, so go easy on me. I am using ArcCatalog 10.0 and trying to snap a set of points to another layer that has roads in it. The points represent 10th miles along the road. Here are ...
2
votes
2answers
602 views

ArcGIS10 Trace tool not honoring classic snapping

I have just installed service Pack 3 for ArcGIS 10 Desktop. Normally I use the new snapping environment, so I am unsure whether this is a new issue with SP3 or if it has been the case the whole time. ...
12
votes
1answer
334 views

How to maintain integrity between changing street network and geocoded points?

We maintain hundreds of thousands of points geocoded against a dual-centerline Navteq street network. We are faced with the challenge of maintaining referential integrity between our points and the ...
15
votes
5answers
1k views

Algorithm to fix topological errors in GIS software apps

Related question here. I notice that ensuring topological correctness is essential for GIS applications, this is because the input from user or polygon boolean operation can have severe topological ...
4
votes
1answer
197 views

Excluding layers from snapping using IPointSnapper

I'm working with ArcObjects in C#, and am trying to exclude all map layers but one (the only one I want to snap to) from the snapping environment. I'm using the ISnappingEnvironment and IPointSnapper ...
10
votes
1answer
570 views

Snap line layer to network in QGIS or PostGIS

I have GPS data I've taken of bus routes, and now I'd like to snap it to my road network. Both layers are line layers in a PostGIS DB. I'd like to use either QGIS or PostGIS, but if I have to go with ...
1
vote
3answers
1k views

ArcGIS 10's Editor and Snapping toolbars question (snapping polyline to another polyline)

Have attempted this about 20 different ways using Editor / Snapping Toolbars and ET GeoWizards but still cannot find solution. Screen shot is attached. Need to snap the green polyline to the red ...
19
votes
7answers
8k views

Removing small spaces between polygons

I have a set of polygons representing administrative districts. The districts were digitized by hand, and there are small spaces between polygons where the polygons should be touching. How can I ...
6
votes
1answer
489 views

Is it impossible to measure Right of Way in ArcGIS?

I'm helping bring CAD people into ArcGIS so that everyone throughout the company is on the same page and there is one database for everything. Right now, one of the biggest hurdles is making sure all ...
2
votes
1answer
596 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 ...
6
votes
5answers
8k views

Snap point to line in ArcGIS

I work in ArcGIS. I want create a network with a point feature and a line feature. And I need that my point feature being on the lines feature. So I should do Snap point to line. But do not know how ...