# Tagged Questions

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46 views

### calculating sinuosity of each road segment

I want to calculate the sinuocity of each road segment of a vector shapefile which contains roads. I have downloaded the python script from enter link description here but I don't know what to do ...
37 views

### Finding angle between vertices to estimate curvature in the same feature class using python script?

Background info What I'm attempting to create is an estimation of curvature, by finding the angle between vertices. The vertices layer was created from using the "Split line at vertices tool" on a ...
97 views

### Determining curvature of polylines

I'm dealing with several thousand polylines of Geologic data with mixed degrees of curvature. I'm attempting to quantify just "how curved" these lines are and was curious if there was a means to do ...
66 views

I'd like to draw filled circles in Google Earth which follow the curvature of the earth, i.e. for 1000ft altitude, not only the circle's edge but also the center is required to be 1000ft above ...
80 views

### Tool that modifies number of vertices but not the feature itself

Do you know the reason, why some ArcGIS tools (like Clip and Intersect) modifies number of vertices, even if the feature is not modified itself? Like on the picture, I use Clip and Intersect on line ...
89 views

### Regarding ARCGIS Curvature values [closed]

I originally had a DEM .tif raster in Decimal degrees. I projected it into a PCS with the spatial reference in ArcGIS as: WGS_1984_UTM_ZONE_44N Then, I took the Curvature tool and with a Z-factor of ...
271 views

### Using cubiccurve in OpenLayers 2?

I want to use cubiccurve in openlayers 2.13, And I have added the necessary files, But when drawing the line is drawn instead of the curve. Files are available on the website: http://trac.osgeo.org/...
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### A point due east of me is closer to the equator? [duplicate]

This footnote: East-west directions can be misleading. Point B, which appears due East from A, will be closer to the equator than A. Thus the curvature found this way is smaller than the curvature ...
162 views

### Slope and Curvature values

From an SRTM DEM I have calculated the slope of the terrain with values that range from 0 to 77 (degrees). I have also calculated the curvature of the terrain and the statistical characteristics of ...
619 views

### How can I calculate the radius or curvature of a meandering river?

I want to calculate the radius of curvature of a meandering river with ArcGIS 10.1. I have used the Planform Statistic Tool, developed by the National Center for Earth-surface Dynamics, to calculate ...
87 views

### Curvature computation for different scales

I would like to assess terrain curvature, i.e. the 2nd derivative of a DEM, on different scales. The most common approach to curvature seems to be the one suggested by Zevenberg (1987) where a ...
695 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 ...
85 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 ...
156 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 (http://blogs.esri.com/esri/arcgis/2010/10/27/understanding-curvature-...
2k views

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 ...
3k 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 ...
196 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 ...
487 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 ...
400 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 http://www.gistutor.com/quantum-gis/20-intermediate-quantum-gis-tutorials/48-quantum-gis-qgis-raster-based-terrain-analysis-...
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### 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 ...
5k 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 ...
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### 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 ...
3k 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 ...