A viewshed is an area that is visible from a specific location.

learn more… | top users | synonyms

1
vote
2answers
31 views

Determining which specific features are visible from observer points using ArcGIS 3D Analyst?

I am working on a wind farm proposal. I have the positions of 70 proposed turbines. I also have the positions of 80 houses within 20km of the proposed turbines. I created a viewshed for the 70 ...
4
votes
1answer
286 views

Site viewshed with DSM: removing “false” visibility readings from trees and buildings

I've been working on modeling a proposed building and running a visibility analysis to determine from what areas the building could potentially be seen using ArcGIS Desktop with 3D Analyst. Using a ...
1
vote
1answer
28 views

Performing Viewshed Analysis for Transmission Line returns general error 999999?

I have a scenario where a transmission line is designed and placed with heights for each structure. With that being said, it is to be proposed to the forest service who is more concerned with how ...
1
vote
1answer
93 views

Viewshed plugin in QGIS doesnt work

I loaded DEM and Point data and as a result i just got black raster (still black after calculation). If I click intervisibility I cant see it like if line data is not there. I tried changing meters, ...
1
vote
1answer
115 views

arcGIS observer point analysis: Exceeding maximum allowed points amount not exceeded

I need to make an observer points analysis (3D analyst tool). I have a shapefile of 22 points, so I divided it in 2 layers of 11 each as the maximum points allowed is 16. However, as I launch the ...
0
votes
1answer
81 views

RuntimeError from r.viewshed in graphic modeler

after using r.los in QGIS want to switch to r.viewshed in GRASS GIS 7. i need to do a lot of viewshed analysis form given points of a vectorlayer. if i try to add r.viewshed to the graphic modeler i ...
-1
votes
1answer
694 views

viewshed analysis QGIS

I'm trying to make a viewshed complemented Quamtun viewshed analysis in GIS, someone managed to do it? in my case not allow me to finish the process skips a misconception among other things tells me ...
2
votes
0answers
79 views

Background (sky/terrain) of a viewshed

Is it possible to determine whether a point feature of a particular height would be backed by sky or by terrain? I've done the viewsheed analysis of a wind turbine. Now I would like to make a raster ...
2
votes
0answers
260 views

How to write script for Line of sight and Viewshed analysis in Global Mapper

I wanted to write script in Global Mapper for Line of Sight and Viewshed analysis. I tried to calculate using Viewshed and Global Mapper Tools but the issue I am facing is that analysis is user ...
1
vote
0answers
44 views

How to create separate viewsheds for individual points?

I have a feature class with 3000 points. My goal is to have a viewshed, at each point, clipped to 50m and 500m buffers. I want to be able to look at the percent visible/not visible for each point. I ...
1
vote
0answers
145 views

Viewshed analysis plugin on QGIS keeps resulting in errors

I've been trying to test the Viewshed analysis plugin on QGIS 2.10, but it keeps giving back error messages. I've tried to reduce the radius area and have also reprojected both my DEM and my point ...
1
vote
0answers
44 views

Viewshed with RpyGeo “rpygeo.Viewshed.sa”

This function is not working: rpygeo.Viewshed.sa(mnt, pt,out.raster="viewshed") *Error in as.character.default(<S4 object of class "RasterLayer">) : no method for coercing this S4 class to ...
1
vote
0answers
24 views

Point to point best link finder, need script?

I am planning a point-to-point microwave system in a geographically very hard area where it is full of mountains. I was searching if there is a way that I set a point and then script a code to search ...
1
vote
0answers
164 views

Need a free\open source library to calculate LOS & Viewshed using C# \ VB

I'm working in a Radio Propagation Analysis project that required to draw the Line-Of-Sight (LOS) between two radio antennas and calculating the View-shed for one radio antenna. So i need a Free\Open ...
1
vote
0answers
119 views

Calculating vector area in QGIS

I have calculated a viewshed (ZVI) in OpenWind and opened the raster in QGIS I have then converted the raster to a vector When I open the attribute table there are 4682 rows (features) and there is ...
1
vote
0answers
217 views

ModelBuilder, Iterate by Field and Viewshed

I want to compute the independent Viewshed for 360 different points. If I run these all together, I have one viewshed output which shows how many times any given cell is visible, but this does not ...
1
vote
0answers
232 views

Virtual machine or bootcamp for ArcGIS

I want to use ArcGIS for viewshed analysis on a Mac. Would virtual machine software such as Parallels or VMware Fusion be powerful enough for viewshed analysis compared with bootcamp?
1
vote
0answers
66 views

ArcGIS Viewshed's show no visibility to south east

I'm using ArcGIS 10.2.2. I've been running some viewsheds using DTM files from EDINA Digimap and data that I've imported using .csv files. These files only contain the X Y details and a code for each ...
1
vote
0answers
150 views

GRASS and r.viewshed

I'm trying to run the r.viewshed command using co-ordinates held in a .csv file I imported using v.in.ascii. It has over 200 rows and I'm looking to run viewsheds from each line, without doing it ...
1
vote
0answers
287 views

Covisibility with QGIS/GRASS : r.los issue

I try to use r.los for a viewshed calculation. I specify the dem (Aster DEM clipped on a 2km*2km region). I specify x and y coordinates and run the command. Nothing append. I waited for 20 minutes ...
0
votes
0answers
30 views

I get the following error with QGIS on Windows 10 while rerunning q viewshed query that had been ok on MacOS

An error has occured while executing Python code: Traceback (most recent call last): File "C:/Users/marys/.qgis2/python/plugins\ViewshedAnalysis\viewshedanalysis.py", line 194, in run ...
0
votes
0answers
19 views

Refining a Viewshed

I have been tasked with finding the observable area of a canoe route based on a drainage, stream and contour file. First, I made the drainage a line file and then merged it with the stream. I then ...
0
votes
0answers
37 views

Problem with Viewshed analysis in ArcObjects

I want to execute the Visibility Analysis Tool using ArcObjects 10.3. I tested the tool in ArcMap and it works great with the test data I provided, hence it should work as well in ArcObjects code. The ...
0
votes
0answers
28 views

Changing defult values in Viewshed tool

How is it possible to define my own values for (OFFSETA, OFFSETB, AZIMUTH1 , AZIMUTH2, VERT1,....) instead of defined default values in Viewshed analysis in ArcGIS?
0
votes
0answers
119 views

Wind Farm Viewshed/ZTV

I've created an ArcGIS tool using ModelBuilder and Viewshed to create a wind farm ZTV and whilst each raster cell tells me whether there's visibility or not it doesn't tell me what the vertical angle ...
0
votes
0answers
217 views

Can QGIS create a “virtual view” from a given position?

I would like to be able to choose a position on a map (by clicking, or by entering an address, or other means -- please suggest) and have an artificial picture created, like what I would see if I ...