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2
votes
1answer
71 views

Is there simple way to calculate radius of curvature along polyline?

I am digitizing a sinuous linear alignment (in this case a water pipe) and would like to get the radius of curvature of the various bends along the alignment. The main reason is that the minimum ...
1
vote
1answer
21 views

Profile curvature and soil moisture correlation: issue in interpretation

I have a question related to the profile curvature values. In an article I was reading (reference provided at the bottom of this question), scholars have found a negative correlation between profile ...
1
vote
0answers
30 views

interpreting the negative and positive values of profile curvature map in GIS

I would like to have help in interpreting the values returned by ArcGIS for profile curvature. By reading this Esri's webpage ...
2
votes
1answer
173 views

Radius of curvature for curves in road segments for entire road network

I have a road network shapefile for a US state and I am trying to derive the radius of curvature for road segments in this shapefile. I need to be able to perform this task within just a few functions ...
3
votes
1answer
300 views

Is there a QGIS bezier curve tool?

I'm a recent convert to QGIS but have been confused about the lack of support for drawing curved shapefiles, especially when Arc has almost too many. A lot of the work that our consultancy do is based ...
3
votes
0answers
77 views

Find the co-ordinates of tangent points and intersection of a curved line [closed]

I have a line with curves in it. Is there an easy way to extract the X Y values for the tangent points and intersection points in ArcMap 10.2.1? Hopefully my simple paint diagram clarifies what I ...
3
votes
1answer
182 views

Grid-like lines appearing after using Curvature tool

I have been attempting to use the Spatial Analyst Curvature tool with mixed results. I originally tried to use it with a raster that was projected using a 1983 Teale Albers projection and the results ...
2
votes
1answer
170 views

Raster terrain analysis on QGIS 2.0.1 - No curvature analysis?

I need to perform a curvature analysis on a DEM. I've found this tutorial ...
0
votes
1answer
110 views

What Z-factor to set in Curvature (spatial analyst)?

I'm making a slope curvature map, my DTM is 5*5 meters cells, in a meter grid projection. The elevation is in meters asl. When using the Curvature tool for different units of measure, the Z-factor has ...
21
votes
4answers
2k views

How to calculate terrain Curvature?

I have an elevation raster and I would like to get some basic terrain variables, such as slope, ruggedness, aspect or curvature. The problem is that I don't seem to have the possibility to calculate ...
11
votes
1answer
529 views

QGis raster terrain analysis - The curvature filter puzzles me

I am a french Master student at university Grenoble INP, and during my master project I have worked on DEM (raster) terrain analysis. Thus, I have read the source code of several QGis-1.7.4 raster ...
3
votes
1answer
2k views

How to curve lines between points on a map?

I'm trying to curve the lines between points on a RaphaelJS map like Tata Communications - but how did they do it? What sort of mathematics lie behind these curves - unless ofcourse they're all ...
37
votes
5answers
8k views

Why is the 'straight line' path across continent so curved?

This is the result of mapping the straight line path from a point in US to Poland using Distance Measurement Tool. Also, planes from Asia to US would travel almost over North Pole. Why is the path ...
2
votes
1answer
351 views

How do I calculate curvature using GIS co-ordinates [closed]

I have GIS data for which I would like to calculate where curvature is present. Anyone has done this before, please help.