New answers tagged distance
1
You can also use pyqgis. This doesnt take the "parallelness" into account, only distance. Although it could be adapted to do so.
import itertools #To get all pairwise combinations of lines
lyr = QgsProject.instance().mapLayersByName('lines')[0] #Change
reproject_to = "EPSG:32633" #Change
mindist = 1 #Change
#Reproject so distance is in ...
3
You can easily achieve this by first rasterizing the road network using the GDAL tool Rasterize (vector to raster) from the QGIS processing toolbox using a desired resolution. In a second step you apply the GDAL tool Proximity (raster distance) that can be found in the same processing algorithm collection.
5
If you have no intersecting lines, use "Select by expression" with this expression including overlay_nearest() and change the max_distance:
overlay_nearest(@layer, max_distance:=1)
Be aware: your layer must be saved in a CRS using meters as units, thus don't use a geographic CRS like EPSG:4326 (WGS84). In this case, first reproject your layer.
The ...
1
The LengthToPointCalculator will do the task you need:
Calculates the length of a feature from its start until the closest spot to a point, and adds it as a new attribute. The point coordinates are taken from attributes in the original feature.
For the LengthToPointCalculator, input point coordinates are an attribute of the line feature. If you have ...
2
You can modify the expression by using:
line_locate_point (to get the distance from the start-point of the line to the point where the line intersects with the polygon (white dot on the screenshot below: the point point where the line intersects the polygon for the second time, = step 5 in the original solution)
line_substring to get the substring (blue on ...
3
Calculate Distance of whole line - distance from the start point (pseudocode) - use this expression:
length (geometry(get_feature('path','Jct_ID',"Point Code")))-
line_locate_point(geometry(get_feature('path','Jct_ID',"Point Code")),$geometry)
or, alternatively (where line 3 contains the expression for the line):
with_variable (
'...
0
If you need a general near distance parameter in feet you can use the following calculation to convert decimal degrees to feet.
Add a field - right-click for field calculator and multiply the decimal degrees field by 364567. It won't be exact but fairly close.
Information was obtained from a nautical calculation website & verified with the measurement ...
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