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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4
votes
2answers
491 views

Specifying snap raster in QGIS?

I am deploying QGIS 3.6 on Windows 10. Using the Raster > Projections > Warp (Reproject) tool, I need to reproject a single-band, float32, GeoTIFF DEM from EPSG:3413 to EPSG:3857. The output ...
3
votes
0answers
55 views

Snap geometry/polygon to grid with minimum distortion

I am working on a project to transform polygons given in a pre-defined precision to a lesser precision, which I think is equivalent to snap them to a fixed spacing grid. For example, in the example ...
6
votes
2answers
929 views

Temporarily suspend snapping in QGIS

Is it possible to temporarily suspend snapping with a shortcut Key in Qgis, like its possible holding down space in Arcmap?
6
votes
1answer
86 views

Merge/join only the lines which are snapped to vertices in QGIS

I have polygons drawn with AutoCAD as Mline (Multiline type) which are rendered in QGIS as 8 segments for each feature. An example of one selected feature is shown in the picture below: I want to ...
0
votes
0answers
46 views

Is it possible to automatically snap polygons in the same layer in QGIS?

there are similar questions but I still couldn't figure out if it's possible to do this in QGIS. I have a layer with categorized point data (3 categories), I use minimum bounding box/convex hull in ...
1
vote
2answers
51 views

Snapping objects to grid without grid?

Is there a function to snap new or moved vectors to a (user-defined) grid on the map similar to the AutoCAD snapping-function without generation a point/line/polygon-grid over the whole region first? ...
2
votes
1answer
93 views

Preventing layer name from snap tip blocking view in ArcGIS Pro?

When I am using ArcGIS Pro 1.2 and I get near a layer, the layer name physically pops up and it blocks my ability to see where the pointer is in relation to the line and its intersection with another ...
1
vote
1answer
34 views

Failing Unions due to Non-Noded Intersections

I'm trying to perform lots of unions in GeoPandas. I've got around fifty sets of between 7-12 GeoDataFrames of the same place at different times that I'm trying to union into one layer per set. Right ...
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0answers
39 views

Merging and snapping shapefiles

I have several large shapefiles from various sources. All cover various sections of oceans and many overlaps, as such the coastline is repeated across the several shapefiles but to varying levels of ...
1
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1answer
271 views

Transposing data points to line using ArcGIS Desktop

See sketch below. The main objective, using ArcGIS 10 or 10.1, is to get the P points to the perpendicular P line and, either the closest B point to the endpoint of the P line where it interesects ...
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0answers
60 views

New Features not snappable

I wrote some Tools for CAD in QGIS with python. Therefore I add a special temporary layer with python, if this layer does not exist. That works fine. To add a new feature I start edit, add the feature,...
8
votes
3answers
3k views

Snapping points to line and calculating 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 ...
4
votes
1answer
43 views

ST_SnapToGrid takes a long time on

My ultimate goal is to fetch all points from a 4 million record table that fit within a given rectangle and group the results in clusters. All of the queries I have tried up until now take too long. ...
19
votes
4answers
12k views

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 ...
1
vote
1answer
445 views

Using terrain correction in SNAP sentinel 1 toolbox removes all the values

I am new to SAR image processing, I have a SAR sentinel 1 dataset downloaded from ESA site: S1A_IW_GRDH_1SDV_20190314T030905_20190314T030930_026328_02F196_2EC3 I am trying to do terrain correction ...
2
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0answers
50 views

Snapping line layer to line layer

I'm working on a project where I need to snap an existing line layer to a different line layer. These lines represent streams and rivers. I'm working within QGIS Maderia 3.4 LTR. I've tried using the ...
3
votes
1answer
452 views

Setting Up Snapping Environment Snapping Type using ArcObjects

I try to setup snapping environment snapping type by referring to this source (http://resources.arcgis.com/en/help/arcobjects-net/conceptualhelp/index.html#//0001000001s1000000) but I can't combine ...
2
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0answers
65 views

Snap GPS coordinates to closest line, get line ID, generate and execute URL

I have a web map in Portal that has a sidewalk line layer. Using Portal, I plan to collect sidewalk deficiencies using GPS (on a Microsoft Surface/Windows 10 device). I would like to add the ...
0
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0answers
25 views

Turning on snapping for edit vertex mode of QGIS

Using QGIS 3.8, I am drawing a line and would like to snap new verticies to another existing layer. I have enabled snapping to other layers in the digitizing settings (see screenshot) What else am I ...
3
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0answers
59 views

Snapping a polygon layer to another layer automatically

I have two polygon layers in QGIS 3.4: Layer A and Layer B. These two layers have been digitized separately. Some features in these two layers are crossing or not meeting each other in some areas ...
0
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1answer
40 views

Snapping doesn't work - MapInfo Pro 17 (64 bit)

I've experienced a strange behaviour during drawing in MapInfo. Snap function doesn't work. Pressing the S key has no effect. I can't turn off snap. When I start drawing in snap mode, the program ...
2
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0answers
23 views

Snap points to nearest line - however limit snapping to polygon the point sits within

I am trying to snap a series of points relative to the nearest line (which i know can be achieved via "Snap geometries to layer", however, i want to restrict snapping to the polygons the points sit ...
0
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1answer
117 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....
7
votes
2answers
2k 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 ...
0
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0answers
25 views

Snapping value = 0 in Qgis

I am building pipes network, I need check connection between of pipes. I want to pipes must snap and tolerance has value = 0. Is there any tool to check and fix this things. I know Topology Checker ...
0
votes
1answer
248 views

Unable to perform SAGA point snapping to line on Win and Mac

I have been trying to snap points from a shapefile to a line feature from another shapefile. However, each time I do this, I get the following error(s) (depending upon the OS used): (For OSX El ...
52
votes
10answers
53k 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. ...
0
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0answers
19 views

Snap raster to specified coordinate point?

Is there any way to get a raster to snap to a specified coordinate point? The documentation for the snap raster environment setting says: The lower left corner of the given extent is moved to the ...
0
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0answers
35 views

Snap points to nearest polylines within buffer (fast)

This is a working version of snapping any point to nearest polyline within a buffer distance. But, this takes significantly longer as each time it copies the point to a different shape and snaps it. ...
12
votes
1answer
7k views

Moving Polygons with snap from edge to edge using ArcGIS Desktop?

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 ...
2
votes
1answer
49 views

Snapping lines together in QGIS

I'm using QGIS 3.8.2. I have a set of lines which represent a road network. However as I have taken different layers from different data sources the lines which represent the same road don't overlap. ...
0
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0answers
25 views

Snapping together lines within certain tolerance with ArcPy and Basic level license?

I have a GIS layer of bike lanes I created using an open-source GeoJSON which I converted to a shapefile using ArcPy. The end result looks pretty good, with one exception: there is some small gaps ...
2
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0answers
64 views

Saga GIS Snap Points to Lines tool doesn't produce required results

I have two sets of data that I'm using. Points extracted from a .csv file and a road network from an ESRI .shp file (both of which I've included here: https://send.firefox.com/download/...
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0answers
47 views

How do I add vertices on a segment in QGIS 3.9.? Double-clicking doesn't work

I tried adding vertices to segments of a polygon by double-clicking on the segment, but instead of adding a node, the nearest node was moved to the double-click. Clicking on the cross doesn't work ...
1
vote
1answer
19 views

Adding points along line by clicking on it using ArcGIS Desktop?

ArcGIS for Desktop 10.6.1. I have a polyline (old railroad track). I'd like to add the train stops as points along it by clicking on the places. I have georeferenced historical maps as the ...
1
vote
1answer
66 views

Combining st_snaptogrid with st_centroid and group by using PostGIS?

I have a table of devices, each of them has a field 'location' that is a postGis geometry(Point,4326) I need to operate a GROUP BY based of the placement on a grid, I'd use ST_SnapToGrid and then I ...
2
votes
0answers
24 views

Using V.clean.snap?

I'm working on creating a road network of pedestrian walkways. Since all data were manually drawn, I'll need to snap the vertices together to form a consistent road network on which I can run routing. ...
1
vote
0answers
101 views

Using Shapely's ops.snap? [closed]

I have two polylines whose endpoints are near to each other, but do not overlap. I've put them into this shapefile. I want to use shapely's ops.snap() to snap their endpoints, but it's not working as ...
2
votes
1answer
66 views

Identify topological errors using FME

I have one single shapefile with many features. There are three different topological errors that I want to be identified (only identified). Line A consists of many segments and some of segments ...
1
vote
1answer
75 views

QGIS Snapping buttons missing

I have had no luck snapping points from one layer to another line layer in both QGIS 2.18 and 3.6.3. The snapping plugin is enabled and editing is on for both layers but there are no 'Apply' or 'OK' ...
2
votes
1answer
89 views

Snapping to sketch' vertices while editing in QGIS?

I'm trying to digitize buildings in QGIS and encountered a problem: after digitizing several vertices in a sketch, I want to place my final vertex in accordance with the first one - i.e 'square and ...
1
vote
1answer
60 views

Harmonize geometry of different shapefiles (QGIS) [closed]

I have got to harmonize the geometry of a big amount of shapefiles in QGIS The files are actually very big. So it would be a lot of work to do it manually. Do you have any suggestions for me?
2
votes
1answer
198 views

Bulk Snapping Points to Line Vertex in QGIS?

I have around 8000 point features that require snapping to the nearest line vertex. Please see below image for reference. I would like to do this in one go if possible. Is there a tool in QGIS 3 ...
1
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0answers
39 views

Snapping to vertices in vector tile layer using ArcGIS Pro?

I am trying to create features in a geodatabase layer using the tracing tool of ArcGIS Pro. I am able to use other shapefile layers in the project for tracing but vector tile layers loaded from the ...
4
votes
0answers
57 views

Snap LineStrings considering direction in QGIS 3

I have 2 projected shape files: Roads (red) and public transit routes (blue): I want to snap the PT routes to the roads, but because of inaccurate marks sometimes the routes are snapped to the wrong ...
0
votes
0answers
69 views

pyinstaller stops in the middle of process

I try to create a .exe from a .py script. I use Pyinstaller. The script runs fine with no errors in Pycharm. If I open the .exe my Tkinter opens I can choose the files etc.. And then in the middle of ...
4
votes
2answers
1k views

GeoTools: Calculate length along line from start vertex up to some point on the line?

I have single LineString and some Point (outside the line), I snapped it to the Line (using DistanceOp so as far as I understood the snapped point should lay on the line). How can I calculate length ...
2
votes
1answer
166 views

Mapinfo Line and polygons from different layers to be snaped

I have a layer that I need to edit [ kerb and gutter (KNG)] which consists only of lines that represent the kerb and gutters on both sides of the road. I have separated the left and right side of the ...
0
votes
1answer
45 views

Making layer visible without having it be snapped to in ArcMap? [closed]

I have one feature created called 'parcel' that shows the borders of houses and another feature called 'conduit'. I need to attach a point feature to the conduit preferably where the parcel boundaries ...
2
votes
1answer
407 views

Snap to crossing between lines in OpenLayers

Is it possible to let the snap interaction snap to the crossing of two different lines (or polygons) in OpenLayers? It can snap to vertices and lines between vertices, but I can't see a way to snap ...