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Questions tagged [snapping]

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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51
votes
10answers
52k views

Removing small spaces (slivers) between polygons? [closed]

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. ...
11
votes
5answers
30k 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 ...
18
votes
3answers
12k 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
3k views

Aligning multiple points to line in QGIS?

I would like to align multiple points to a line, or lines within a layer, using a specified tolerance or buffer around the line objects. Please refer to the sample sketch attached. For the sake of ...
13
votes
2answers
9k views

Unable to snap vertices and segment in QGIS 3.0

I'm unable to snap 2 polygons in QGIS 3.0. I tried snapping 2 polygons from the same layer and also 2 polygons from different layers. I ensured that snapping is enabled in the Settings>>Options>>...
32
votes
2answers
57k views

Enabling “Snapping” in QGIS while drawing polygons?

I tried to draw polygons in QGIS 1.7.0 and somehow I 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
2answers
3k views

Snap points to line and calculate chainage using Open source GIS

I have a line layer (representing a pipeline) and a points layer (representing valves) and I would like to calculate the chainage of the valves along the pipeline. I assume that I would first need ...
5
votes
2answers
906 views

QGIS doesn't update some snapping options from Python

I've just installed QGIS 2.14.3 (Essen) on a Windows 7 machine, so I've got the default configuration on everything. This means that under "Settings -> Options -> Digitizing", I've got "Default snap ...
6
votes
2answers
3k views

Snapping two polygons together in GIS

I have been digitising a historical map which contains large areas called townlands, filled by smaller areas called fields. I digitised both as two separate vector layers, both polygons. When ...
4
votes
2answers
1k views

Snapping multiple nodes of a polygon to the nodes of a line?

I am working with vector polygons that have derived from hand drawn areas from when mapping was carried out with tracing paper over paper maps. Therefore many of the polygons don't exactly line up to ...
7
votes
4answers
8k 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 ...
2
votes
1answer
1k views

Snap points shapefile to line shapefile using shapely

I have 2 datasets: 1) a road network shapefile which has many polylines and 2) a bus stop shapefile which has many points representing bus stops. My points shapefile has CRS of EPSG 4326 and my line ...
5
votes
3answers
5k views

Is it possible to perform automatic snapping of polygons in QGIS or ArcGIS?

Note: in the picture below white space between the polygons is blank space – it does not contain any polygons as a result of Intersect or Union functions.
4
votes
2answers
15k views

How to snap lines to nearest point?

Is there an easy way to snap lines to nearest point of either a line or a polygon? I don't see any snapping options for line layers as suggested on How to merge lines with slightly different endpoints ...
3
votes
1answer
2k views

how to snap two line vertex in two different layers used in QGIS

I want to snap between two poly-lines from 2 different layers (Layer1 in Brown and Layer 2(postGIS layer) in Pink color- ), but my snap option don't work. I have changed the tolerance to different ...
3
votes
4answers
5k views

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

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 the general steps for what i am doing: ...
2
votes
1answer
3k views

Snapping many vertices from line or polygon layer in QGIS?

I have several lines(streets) and polygons(plot layout of areas) that the shared points (lines: road intersections, polygons shared plot corner) are not connected. Is it possible to auto snap all ...
1
vote
1answer
552 views

Snapping one vector layer to another

Is there anyway to snap one set of vectors to its nearest neighbor vector in another feature class? For example, I have a road feature class and a feature class of bridges and I want to snap the ...
14
votes
0answers
1k 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 ...
12
votes
2answers
897 views

Is there any option in QGIS to draw parallel lines that snap on the outside part of the line (adjacent lines) that are independent from scale?

I have to draw a map of a public bus transport network and i have a problem in the avenues where a lot of lines passes by. My objective is to make a visual map where the lines in those avenues are ...
17
votes
11answers
22k views

Why won't ArcMap 10 snap? [closed]

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 ...
6
votes
2answers
9k views

snapping polygons and lines [duplicate]

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 ...
3
votes
1answer
617 views

Snap lines to nearest line in PostGIS

I have a number of pedestrian trajectories (green) that I would like to snap to the nearest road (brown). The roads are downloaded from OpenStreetMap and have been dissolved by name with CREATE ...
12
votes
4answers
27k 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 ...
3
votes
1answer
311 views

Is there an alternative to the Integrate tool that will not change one of the inputs

I have two polygon layers, and would like to snap the outlines of one of them (colored poly's) to the other (grey) without changing the grey in anyway (so Integrate seems out). It should only snap if ...
2
votes
1answer
1k views

Snap to closest polyline from point

I want to create a new layer/shapefile, containing polylines that represent a connection to a grid. I have a layer of points and a layer of polylines (see picture below), based on this I want to ...
9
votes
1answer
2k 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 semi-...
3
votes
1answer
306 views

Splitting polyline with ArcGIS Pro snapping environment?

I would like to take advantage of the 64-bit environment and speedier screen refreshing for some editing we do. Although I personally don't find the ribbon interface very intuitive, the ArcGIS Pro ...
3
votes
1answer
3k views

Is there FME transformer to snap point on point of nearest line?

I have a DWG file which has lines and points. I use FME (2014) to translate it into a shapefile. This works fine but now I want to add some transformers in the workflow. The first thing I want is to ...
3
votes
1answer
384 views

Snap to a linestring

I'm trying to create a line snapping tool in my Android app where I'm using the spatialite-android lib. I'm using the function ST_Snap where I want to snap a linestring with another linestring on the ...
3
votes
1answer
2k 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." ...
3
votes
0answers
287 views

MODIS Imagery Orthorectification (Open Source)

I am looking for an open source free software/tool for orthorectification/Geometric terrain correction of MODIS imagery. I have looked at ESA (European Space Agency) SNAP but this sensor type is not ...
2
votes
1answer
759 views

How can I enable topological editing in QGIS 3

How can I enable topological editing (create shared nodes on adjacent polygons or intersecting lines) and also activate the option to prevent polygon overlap (that when a new polygon is drawn, its ...
1
vote
2answers
1k views

How to snap polygons to lines?

How can I snap a polygon to a line? For example, I have a polygon which represents some meadows to snap over a line which represents a road.
0
votes
1answer
82 views

ST_SnapToGrid doesn't work properly, e.g. 41.94186153740355 -> 41.941861499999995

I'm using ST_SnapToGrid: ST_SnapToGrid(somePoint, 0.0000001) and I get strange result on many points, such as: - POINT (21.619820510769063 41.94186153740355) -> POINT (21.6198205 41....
-1
votes
3answers
57 views

Using arcpy.da.SearchCursor to script snapping one set of points to location of another set of points? [closed]

I am trying to shift a large number of point features (layer name Building_Point_NeedToSnap) to a newly created second set of point features (layer name BuildingFootprint_XYTablePoint) which is based ...