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2
votes
1answer
1k views

Layer visibility using maxscale minscale not working

I'm using Openlayer and Geoserver. I have a series of layers that have a scale parameter like: 1:50000-1:25000 where 50000 is the max scale while 25000 is the minscale. I have a map like in this ...
1
vote
1answer
42 views

How can I change layers visibility while I zoom in geoserver?

I want to change layers visibility while I zoom , here are my screenshots. where is my error ? I'm waiting your helps , thanks.
3
votes
2answers
33 views

SetVisibility(false) does not work

layer_gesamt = new OpenLayers.Layer.WMS( "Geoserver layers - Tiled", "http://mygeoserver/xyz/wms", { LAYERS: 'myLayer', STYLES: ...
0
votes
0answers
9 views

How to re'display feature after using my 'filterFeature()' function?

The code below is a function that hides a certain region in the map. The problem is that I can't redisplay it. I've tried by removing this line: wfs2.features[i].style = {visibility:'hidden'}; but ...
4
votes
2answers
74 views

Calculating the visibility of an observer walking a line transect

I was wondering if anyone can help. I'm want to calculate the visibility for an observer doing a bird survey by walking 1km transects broken up into 200m sections. I want to calculate the visibility ...
1
vote
0answers
28 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 ...
2
votes
0answers
41 views

Incomplete Visibility Product

I am running ArcMap 10.2 and have been trying to complete a fairly large viewshed analysis and have chosen to use the visibility tool in order to be able to produce an optional above-ground-level ...
2
votes
0answers
57 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 ...
5
votes
5answers
411 views

Problem in multiple dataframe visibility in arcgis 10

I have added four dataframes on singe canvas. Within Arc environment everything works perfectly but when I export the map to .eps or .pdf or .jpeg two of them are working properly while the other two ...
1
vote
0answers
126 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
3answers
119 views

Calculate Number Of Pixels Visible From Pixel

I am looking for a way in which to take an input DEM and create an output raster whose pixel's value is the count of pixels "visible" from that location. I use ArcGIS with Spatial Analyst, but also ...
10
votes
4answers
925 views

How to calculate the visible sky percentage

Hi I am writing a project and I am stuck: can anyone explain as simply as possible how to calculate the visible sky percentage? I have done a satellite survey and have worked out the height of ...
0
votes
0answers
57 views

OpenLayers: WMSGetFeatureInfo shouldn't return feature when a layer is hidden

In OpenLayers, I have a map with several layers. I created a control to query the layers and return feature info. var info= new OpenLayers.Control.WMSGetFeatureInfo({ ...
0
votes
0answers
40 views

How to perform Visibility Analysis using QGIS? [duplicate]

How can I calculate Visibility using QGIS? I have not found any suitable plugins for QGIS to do this.
5
votes
2answers
3k views

Viewsheds and Observer Points in ArcGIS Spatial analyst

I am trying to understand the viewshed and observer points tool in spatial analyst. I want to show which areas of land can see a wind turbine, or put another way, from where can the wind turbine be ...
0
votes
1answer
1k views

Toggling layers with arcgis javascript api 3.5

I am using the two reference samples in the api, toggle and dynamic toggle. I tried to use the method in the basic toggle but the setvisbiblelayers doesn't seem to like my kml layers and I get a ...
6
votes
3answers
446 views

How to Display Overlapping Lines?

I have multiple line layers that represent bus routes and many of the routes overlap (i.e. near terminals, transfer locations, etc.) Is there a function in Qgis which will display both features ...
4
votes
1answer
114 views

What's the best way to run a visibility analysis in PostGIS 2?

I am looking for the best way to run a visibility analysis in PostGis 2, i.e. given 2 points and obstacle polygons, are these 2 points visible from each other ? I did not find anything relevant for ...
4
votes
3answers
4k views

openlayers toggle visibility of layer

EDIT: I have cross-posted this to Drupal Answers. I hope this isn't too much against the rules --- I think the answer will be something to do with both Drupal and OpenLayers. ...
1
vote
0answers
198 views

Layer set visible

I add this layer like this: var POIData = new esri.layers.ArcGISDynamicMapServiceLayer("https://mysite.com/ArcGIS/rest/services/POI_Data/MapServer"); map.addLayer(POIData); ...
0
votes
1answer
132 views

Control visibility of multiple layers

I am displaying multiple feature types using one layer in OpenLayers, like here: var **vector** = new OpenLayers.Layer.Vector("My Layer", { maxExtent: new OpenLayers.Bounds(-1.09863,44.42907, ...
0
votes
0answers
128 views

How to calculate visible sky percentage [duplicate]

Possible Duplicate: How to calculate the visible sky percentage i have done a sattelite survey and have worked out the height of buildings and the distance between them how do i use that ...