QGIS Geometry From Expression
2.1 هزار بار بازدید -
3 سال پیش
-
Geometry generators is a cool
Geometry generators is a cool concept in QGIS that will allow you to alter the visual representation of a feature for display purposes, but did you knew you can actually create a layer using processing algorithm geometry by expression? This allows to have the actual features not only for display but for other purposes like analysis
In this video I will go into applying a geometry generator and then creating a layer using an expression.
The expression used in the video is the following
with_variable('nodes',nodes_to_points($geometry,true),
collect_geometries(
array_foreach(generate_series(1,num_geometries(@nodes)),make_line(geometry_n(@nodes,@element),centroid($geometry)))))
Timestamps
00:00 Using Geometry Generators in QGIS
00:50 Setting Geometry Generator Symbology
02:15 Add Geometry Generator Expression
04:08 Change Geometry Generator geometry type
04:42 Using processing to create geometry by expression
05:32 Exploding MultiLine by in place explode lines algorithms using processing
Website & blog: https://www.antoniolocandro.com
twitter: Twitter: antoniolocandro
#qgis #gis #antoniolocandro #geometrygenerator #processing
In this video I will go into applying a geometry generator and then creating a layer using an expression.
The expression used in the video is the following
with_variable('nodes',nodes_to_points($geometry,true),
collect_geometries(
array_foreach(generate_series(1,num_geometries(@nodes)),make_line(geometry_n(@nodes,@element),centroid($geometry)))))
Timestamps
00:00 Using Geometry Generators in QGIS
00:50 Setting Geometry Generator Symbology
02:15 Add Geometry Generator Expression
04:08 Change Geometry Generator geometry type
04:42 Using processing to create geometry by expression
05:32 Exploding MultiLine by in place explode lines algorithms using processing
Website & blog: https://www.antoniolocandro.com
twitter: Twitter: antoniolocandro
#qgis #gis #antoniolocandro #geometrygenerator #processing
3 سال پیش
در تاریخ 1400/12/16 منتشر شده
است.
2,139
بـار بازدید شده