arcgis-desktopland-surveypolygonqgis
I am trying to figure out how to make survey lines within a polygon.
So first I make a polygon. Now I need to fill this polygon with lines, where I can choose the spacing between the lines, and the angle of the lines. All the lines have the same angle and spacing.
I am trying to do it in QGIS, but I also have ArcGIS for Desktop.
Does anybody have an idea of how to do this?
Here is how I would proceed
I am not sure of the lines between which is the angle.
If between the line and the x axis:
If between the origin and a given point:
This can be achieved with the traditional line equation or with the point-slope equation
. In both case, this (the origin b or the point) will be obtained based on the spacing between the lines.
With the equation of each line, we can create a segment contained withing the rectangle. For this step, I would use the functions in the shapely library (union, intersection,...)
You can do this with the Intersect tool. Normally, performing an intersect with polygons will only return the overlapping area. But if you change the output_type from INPUT to LINE, then you can get just the collinear borders between polygons.
If this is our input:
And we change the output_type parameter:
We get the green lines as output:
The output contains two line features for every border segment. To collapse this down to one feature per border segment, you'll want to run Dissolve with the multi_part parameter set to SINGLE_PART. Then, run a Spatial Join with your dissolved lines as the target_features, the intersected lines as the join_features, your field_mapping setup with two fields for every input field (one using the FIRST merge type and the other using the LAST merge type), and the match_option set to ARE_IDENTICAL_TO. Your output attribute table will look like the following:
Best Answer
You can accomplish this in ArcGIS using the following approach: