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4
votes
1answer
3k 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
100 views

Vector layer visibility using min/maxResolution is not working in Openlayers 2

I am using OpenLayers 2 and Geoserver. I have a few WFS layers and an OpenStreetMap as a Baselayer. I want to change the vector layers' visibility at certain zoom levels, by using min/maxScale or ...
2
votes
0answers
23 views

QGIS tiff image loaded but not visible

In QGIS I used the Georeferencer on a jpg image I had prepared in Gimp. But when I load the resulting tiff image into my QGIS project it is invisible, even though an image viewing program can show it ...
11
votes
4answers
1k views

Calculating visible sky percentage?

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 buildings and the distance between them. ...
4
votes
0answers
84 views

Incomplete Visibility Product [closed]

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 ...
0
votes
1answer
28 views

Is there a way to turn a data frame off in ArcMap 10.2?

I have an mxd with three data frames. I've written a python script that loops through a list of user-specified coordinates and scales for each data frame before exporting the mxd as a pdf. Is there a ...
1
vote
0answers
27 views

How to determine Grass (i.atcorr) tool control file's “visibility for the aerosol model [km]” value

In Grass, the Atmospheric Correction tool (i.atcorr) reference do not provide information with regards to the parameter "visibility for the aerosol model [km]"stated in the control file.I have ...
0
votes
0answers
12 views

Leaflet geoJSON point layer with divIcons (SVGs) how to toggle visiblity?

I have posted a few related questions about this topic here here and here. I have tried to set the opacity of the layer, then reset it with setStyle on a zoom event like so: Layer18 = ...
2
votes
0answers
32 views

How to determine Visibility Map for Atmospheric Correction

As per Grass wiki: https://grasswiki.osgeo.org/wiki/Atmospheric_correction the atmospheric correction could be done using a visibility raster in conjunction with an elevation raster. With regards to ...
2
votes
3answers
194 views

Viewshed Analysis - use DSM or DTM?

I need to run a Viewshed analysis (ESRI 10.2 spatial analyst tool) to answer this: what areas will be able to see a proposed 30m high structure. I have the choice of a DSM or a DTM to use as the ...
2
votes
1answer
30 views

How to display street names from OS StreetAny layer?

Using QGIS version 2.10.1-Pisa. I have imported layers from an Ordnance Survey data set. I have a layer called 'Street any' which gives me the boundaries of the streets which I can see. I can see ...
5
votes
2answers
4k 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 ...
1
vote
1answer
59 views

OpenLayers 3 Layer Visibility Checkbox

This JSfiddle example currently changes the visibility of a layer using two individual buttons. However, i want to change this to just one check-box, the check-box in this case has been styled by ...
0
votes
2answers
49 views

Viewshed 2. Understanding of VAT and observer-region relationship table

I am having a hard time using new Viewshed 2. I am trying to join values from result raster with observer-region relationship table (ORRT) using Value from raster and Region from ORRT. I couldn't ...
3
votes
1answer
40 views

Visible altitude across a raster from a point

I have a raster surface model and I'm trying to determine the height an object would need to be at to be visible from an arbitrary point at an arbitrary altitude. I am currently using Grass and have ...
0
votes
0answers
36 views

Code implementations for Isovist, visibility [not build in tools in ArcGIS]

I'm looking for things similar to this: http://www.visilibity.org/ This is Open Source C++ library for Isovist & visibility computations. Similar code exist for example inside ArcGis and other ...
0
votes
0answers
36 views

Grids stay visible in QGIS Composer Legend when turned off in project

I am using QGIS 2.8 to create a template for a dataset library. Lots of layers - vector and grids. The grids stay visible in the legend even when turned off in the map. I am using the "Filter Legend ...
1
vote
1answer
144 views

Checking layers with scale based visibility for visibility in QGIS

I am writing a Python method which I want the mouse click event to connect to. The method selects objects from layers that satisfy certain conditions. I want to select from any visible layer, that has ...
1
vote
1answer
39 views

Visibility analyses of two objects with ArcMap?

I'm struggling with a visibility analyses task in ArcMap. I have two objects: a spire and a WTG (wind turbine generator). Both are point features. The object's heights are deposited in the attributes ...
0
votes
0answers
31 views

PosGIS: Longest line connecting point to line

I have a point and around it lines and polygons in the rule of obstacles. I want to connect the point to each of the lines, with a line, such that this connecting line is not intersect any obstacle ...
1
vote
1answer
42 views

ArcGIS Layer Visibility Shortcuts or Tools

I am wondering if there are ways in which we can enable the layer visibility when holding a key and turn the layer off when releasing the key (in ArcMap). Something like in some online games you can ...
1
vote
0answers
34 views

PostGIS: Compute isovist

I'm using PostGIS with OSM table of buildings. How can I compute isovist from single location point while only the buildings (represnted as geom's) are the obstacles. Thanks,
0
votes
1answer
201 views

How to set the visibility range of layers on CartoDB using CartoCSS?

I would like to customise the visibility of different layers on a CartoDB webmap so that they appear and disappear at distinct zoom levels. How is this achieved?
2
votes
1answer
107 views

Accessing layer's visibility presets?

is there a way to programmatically access the layer's visibility presets defined in the layer tree view widget ? (methods, properties ... ?) Thanks ! To avoid misunderstandings the part i want to ...
0
votes
0answers
24 views

What's the relationship between visibility and reflectance?

I'm having a problem with the atmospheric correction of remote sensing images. Until now I believed that increasing the visibility (or decreasing AOD) resulted in an increase in reflectance but now ...
0
votes
1answer
45 views

Vertical section of viewshed

How can someone make this vertical section of a viewshed analysis (e.g. in ArcMap)?
1
vote
1answer
109 views

ArcGIS Online Visibility Range?

Apparently the lowest scale visibility in ArcGIS Online is 1:1,250. It would really be nice if a map could zoom in closer than this. In fact, some of the maps that I published in previous years to ...
9
votes
3answers
982 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 ...
0
votes
1answer
27 views

Extracting Table data from Raster created by iterated visibility test

I would like to run a visibility test using the observer function on each of 500 random points in a region, and end up, ultimately with a table showing the visible area results (count cell for each ...
0
votes
1answer
36 views

Is there a way to hide certain values in a layer on ArcPad 10.0?

My organization uses Arcpad 10 on a trimble nomad. We have many data points in an environmental survey layer, but I would like to only display points from the last two years on Arcpad to help add ...
3
votes
3answers
96 views

Layer Extent NOT Set When Bringing In ArcGIS Server map service?

I published a mapping service on ArcGIS Server 10.3, set the layer to 'Don't show layer when zoomed' 'in beyond' to 1:577,791, prior to publishing. When I bring in the mapping service into ArcMap, ...
0
votes
0answers
99 views

How to create visibility map in ArcGIS

I want to create a visiblity map for a certain area. First I created a fishnet based on the DEM. Next i need to calculate the visible number of cells for each observer point. Using viewshed for each ...
0
votes
1answer
1k views

toggle visibility of a Layer in Openlayers 3(!) with a Checkbox

I have some vector layers on top of a tiled layer and a checkbox for each vector layer. I want a layer to be visible if it's checkbox is checked and vanish if it gets unchecked. I tried to call a ...
0
votes
1answer
148 views

How to hide labels in ArcGISDynamicMapServiceLayer

Hi guys does anyone know how i would go about hiding labels in a ArcGISDynamicMapServiceLayer? This is part of my code so far: var routeLayer = ArcGISDynamicMapServiceLayer(...); ...
1
vote
1answer
148 views

Conversion problem with 'Feature to Raster': resulting Raster not visible in ArcMap

I want to convert a Shapefile consisting of numerous point-features that each represent a specific height in my DEM to GRID-format so that i can then analyze it with Spatial Analyst. Mysteriously, ...
2
votes
0answers
41 views

How can I manipulate the number of points visible according to scale?

I've gotten trillions of points extracted from a DEM and they are to be labelled. It's fine at scales such as 1:500 but it gets too cluttered especially if I need to make maps of this with scales up ...
1
vote
1answer
204 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
378 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
10 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
232 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
64 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
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 ...
5
votes
5answers
2k 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 ...
2
votes
0answers
233 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
274 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 ...
0
votes
0answers
42 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.
0
votes
1answer
2k 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 ...
4
votes
1answer
173 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
7k 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
295 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); ...