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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2
votes
1answer
383 views

QGIS snapping not working for me

I am new to QGIS, and this is a very basic question. I made a new polygon layer, to trace cadastral boundaries off a raster map. I want the polygon nodes on adjoining acreages to snap together. Some ...
2
votes
0answers
35 views

automatic snap line to line [duplicate]

I need to automaticly overlay/snap the red line (gps-track) exact on the lines of my roads-shape. Is that possible?
4
votes
4answers
407 views

Is there a way to snap to apparent intersections in ArcGIS 10.1+?

Suppose there are two lines in an ArcMap 10.1 or 10.2 editing session that cross but do not intersect, per se. This is the case when new lines a drawn. Is there a way to snap to the point where the ...
1
vote
0answers
173 views

Snapping “Point to Line” Results to Correct Streets

Here is the problem I am facing. After geocoding some addresses, I used the "point to line" tool. Some long streets with minimal matching address points created long lines that intersect the road ...
4
votes
1answer
1k views

Move Polygons with snap from edge to edge

I have such a basic question, but can't find any solution. I have some hundred rectangular Polygons and want to move them to other, already existing Polygons. The borders of these polygons should ...
1
vote
1answer
586 views

How to change the color of red edit-polygon or purple snap-confirmation?

I'm having trouble seeing the purple or pink snapping confirmation when drawing a polygon because the temporary polygon is red (QGIS 2.0.1). Also the vertices in edit mode are also red. I looked ...
3
votes
1answer
341 views

Snapping doesn't work when many layers loaded!

I am using Arcmap 10, when I have only limited number of layers loaded, the snapping experience is perfect but when I have many layers loaded specially polygons, snapping process is painful. My cursor ...
2
votes
1answer
513 views

Tracing Boundary Around a Polygon Shapefile in QGIS

I'm looking to create a boundary around this shapefile of street blocks to have show the city limits in QGIS. I tried this solution, (Settings > Snapping Options and enabling the "Avoid Int." ...
1
vote
0answers
55 views

How can I do multiple snapping of vector layers in QGIS?

I have a network of a transport system that I created from 1970-2013. However, the accuracy is letting me down as I used different snapping settings throughout the process. Is there a plugin or a way ...
1
vote
0answers
107 views

how to avoid Intersection of polygons via python code

i am using QGIS 1.8 and i can set the check box in Setting\Snapping Options "Snapping and Digitizing " dialog to avoid polygon intersections and enable topological editing but i am looking for a way ...
2
votes
1answer
530 views

ArcGIS 10.1 Python script to snap points to lines

I have 2 Feature Datasets in a geodatabase. One dataset contains bus routes and the other contains bus stops for each route. I want to create a script that will snap the bus stops to the vertex of the ...
2
votes
3answers
802 views

How to connect stops to road for network dataset?

I have 3 files a bus route network, road network and bus stops. I want the bus stops to be the connections between the road network and the bus route. When I try and build the network dataset I am ...
0
votes
1answer
168 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
388 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
756 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 ...
7
votes
3answers
871 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
29 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
1answer
174 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 ...
14
votes
0answers
339 views

How to implement a “Snap to Road”-functionality? [duplicate]

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
1k 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 ...
6
votes
1answer
651 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 ...
14
votes
3answers
5k 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 ...
10
votes
3answers
759 views

Real time map matching using ArcGIS Desktop?

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
629 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 ...
7
votes
1answer
8k 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 ...
7
votes
4answers
3k 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
627 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
278 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
438 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 ...
2
votes
1answer
721 views

Snapping lines to points

I have a layer containing a vector 'Line 1', that originates at point 'A' on a second layer. I also have point 'B' on a third layer. I want to create 'Line 2' that has the same angle and length of ...
5
votes
2answers
7k 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 ...
1
vote
1answer
189 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
280 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 ...
12
votes
9answers
10k 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
338 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 ...
7
votes
1answer
1k 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
2k 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
1k 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
420 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
2k 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
331 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 ...
11
votes
1answer
825 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 ...
2
votes
3answers
2k 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 ...
23
votes
7answers
24k views

Removing small spaces (slivers) between polygons?

I have a set of polygons representing administrative districts. The districts were digitized by hand, and there are small spaces (slivers) between polygons where the polygons should be touching. How ...
6
votes
1answer
666 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
1k 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 ...
9
votes
4answers
15k views

Tool or process to automatically snap endpoints of polylines within given proximity using ArcMap?

I created a network of polylines that were all supposed to be connected. However, I just realized that many of the endpoints of the lines aren't connected, but are very close. I think there should ...
8
votes
5answers
15k views

Snapping points to lines in ArcGIS Desktop and automate using VBA?

I use ArcGIS Desktop and I want create a network with a point feature and a line feature. I need my point features to be on the line features so I should do Snap point to line. However, I do not ...