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Questions tagged [offset]

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Creating offset curve using PyQGIS [closed]

How can I create a offset curve to polygon with distance 2m, in python console or python script of a layer of type Polygon? I am using QGIS 3.x.
3
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0answers
36 views

Offset Expressions Dynamic QGIS - Unique non-repeating Numbers

I am trying to create a layer style that shows line features that share the same geometry, an exploded view for line Features. What I have done so far via the Offset expressions in QGIS 3.6 ("...
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0answers
42 views

Large offset between two identical vector layers

I want to have a dxf layer to overlay another layer. The dxf layer is already saved to a shapefile with the needed crs. The layer has a large offset and nothing happens when I set the crs to the ...
7
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1answer
150 views

Connecting offset point symbol to its original position in QGIS?

I'm drawing a track where I want to place icons (point symbols), but with an offset so that the line is fully visible. Here is an example: The origin is exactly on the track, therefore when zooming ...
3
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2answers
189 views

Line Offset Tool in QGIS 3 not working between different layers

In QGIS2 it was possible to use the lineoffset tool between two different layers. You could for examle use a polygon from a different layer to generate an offset line in your linelayer. In QGIS3 this ...
1
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0answers
30 views

What is the sIgnificance of equator in GPS offset calculation?

I am going through a SAE document where it says that the GPS offsets (NodeLL) should be calculated in such a way that the range should be within one of these: ranges of +- 0.0008191 degrees ranges of ...
2
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2answers
141 views

Producing offset after georeferencing Soviet topographical military maps from printed control point coordinates in QGIS

I have 'acquired' a collection of scans of (previously top-secret) Soviet-era military topographical maps at a set of 1:25.000. I want to georeference a set of these scans. I know the coordinate ...
3
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0answers
246 views

QGIS draw line segments with “geometry generator” based on segments angle

I have quite a hard problem to solve here and I don't know if its even possible with the geometry functions in QGIS. I have a line geometry with equidistant vertices, that is, same length segments. ...
1
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1answer
47 views

Does QGIS Cloud support offsets for symbology?

I used the offset settings for symbols in QGIS 2.18 but when uploaded to Cloud, the offsets don't seem to exist. Can this setting be used in QGIS Cloud or is there an alternative?
0
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1answer
70 views

Offsetting 100 ft from line feature while editing in ArcMap?

I have the ArcGIS 10.6 advanced lisense. I am trying to offset a line feature using the editor tool. I know that I can do it in COGO, but how to set the unit as ft. In COGO, the offset unit option is ...
1
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0answers
49 views

PostGIS generate lanes for multilinestring map (ST_OffsetCurve)

I currently have a road network for specific area as multilinestrings. It only shows the road as a single line. I would like to generate lanes for that as well, using some kind of offset. The problem ...
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0answers
27 views

Offset line, when zooming out line extends at intersections

[1[]2I'm doing offset in ArcGIS in a cartographic line symbol. Before the offset the line in all scales appears OK. But when zooming out, the offset line extends out at intersections. While when ...
0
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1answer
61 views

Map Offset, Design not in Line with Map when I load my workspace

We are facing an issue when using QGIS to plan and design FTTx networks. We create the design and it all looks great and print it via composer to be validated on site but when we go back into the ...
1
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0answers
82 views

How to offset points from a coastline

I need to create a set of points with a fixed spacing and given distance from a a georeferenced coastline. My idea is trying to obtain a parallel line and then placing points on it. To do the first ...
0
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0answers
680 views

Offsetting polygons by meters with clipper

I would like to create buffered polygons of locations (towns, villages etc) in order to use them for searching in radius. This is what I would like to achieve (units for ilustration): This is how I ...
1
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2answers
813 views

Adding offset to overlapping lines in qgis in same layer?

I have ONE layer of linestrings and some of them are overlapping, I need to display the overlapping lines with an offset. I have seen the solution using the offset in style for the whole layer but it ...
5
votes
1answer
222 views

Is there a way to use windowing functions (lag, lead) within the QGIS Field Calculator?

I am keen to compute a windowing function on values in QGIS. I was not able to find a lag/lead function. I think this could be emulated using @rownumber and $currentfeature, but I am not expert in ...
2
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1answer
1k views

ArcPy Solution for Copy Parallel

This question has been marked as a duplicate multiple times now. Please read the entire question before flagging it as a duplicate. The previous "duplicates" for questions about copy parallel do not ...
1
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0answers
101 views

GDAL gdalwarp usage on QGis - how to set cell position of the clipped raster to be equal to the origin of the source cell

I work on a Windows QGis 2.14 platform. I need to clip a raster with a vectorial polygon. When I use gdalwarp I cannot find where is the setting for establishing the output graticule position respect ...
2
votes
1answer
1k views

Lat/Lon point transformation/offset on arbitrary segment

I'm looking for something very similar to those stack exchange GIS questions: Algorithm for offsetting a latitude/longitude by some amount of meters, How to convert (geodetic pose + cartesian offset) ...
3
votes
1answer
2k views

Create offset polygon

I am looking for a method that enables to create offset polygons with a defined distance in ArcGIS. Like in Sketch Up, it allows to create the exact same shaped polygon as its input (selected) polygon....
0
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1answer
529 views

add scalefactor and offset to NetCDF

I am converting some NetCDF files from Float32 to either 16bit or 8bit to safe space on a server. Since I Originally created these NetCDF using GeoTIFF´s this is where I apply the conversion before ...
5
votes
2answers
284 views

Preventing Symbols offset in map from being offset in legend of QGIS?

I've been searching for a solution to this, but cannot seem to find an answer. I have a map where some stacked markers have been offset to be visible on the map. This makes their symbol offset in the ...
3
votes
1answer
727 views

Multiple and Sequential Parallel from line

I have a vector line and I want to create multiple sequential parallel lines of this line. How can I do that ? For example, in AutoCAD you can do many offsets by a determined distance, and I want ...
5
votes
1answer
800 views

Data Defined Override XY offset input

I have several rectangular polygons that overlap each other and I'd like to label them with the ID's (for atlas page numbers). The image below shows my initial setup. I've offset each label from the ...
3
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0answers
241 views

Alternative to Event layer plugin for QGIS > 2.8?

It appears to me and from another post that the qgis "Event layer" plugin is not fully functional in versions above 2.8. Trials using versions 2.14 & 2.18 failed to generate a Point memory layer. ...
2
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2answers
2k views

How do I zoom/Pan to a Leaflet Map, such that the given point is off-center?

In my Leaflet Application, on some event, I want to zoom to a particular marker, and then show it's popup. I have certain other custom components on top of the map, and the Popup that appears, is ...
8
votes
1answer
381 views

Using a formula to set the offset of a line pattern on QGIS 2.18

I’ve been trying to fill city boundaries polygons with a 3 colors stripes pattern (red, orange, green), whose respective thickness is proportional to 3 variables, different for each city, but whose ...
3
votes
1answer
525 views

Generating line offset, perpendicular using PostGIS?

I'm trying to generate two line offsets from a line but I'm having problems generating them as they should be. Using PostGIS select st_asgeojson(st_union(the_geom)) from ( select ST_Line_Substring(...
4
votes
2answers
369 views

How to write a CASE WHEN expression for label offset?

I would like to label to feature with id 1 and 2 with offset x of -10 mm and the offset y with 5 mm. But on the GUI there is only one data defind overried. Is it possible to change that for the x and ...
1
vote
1answer
305 views

Is there a Field Calculator or GUI based way to move points by angle and distance in QGIS?

In QGIS what is the best way of moving an existing point (or digitising a new point) when you have: the starting x,y (UTM) coordinate; the angle from compass bearing towards the unknown point, and; a ...
3
votes
1answer
3k views

How to graphically offset the boundary line of a polygon in QGIS?

In Arcgis, there is a way to offset graphically the contour line of a polygon like below. I'm trying to do the same thing in a styling method (i.e the solution can't be by buffering physically the ...