The representation of data in a viewable medium or format

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2
votes
2answers
138 views

Is there any systematic way to pick two colors for a chloropleth showing a candidate's margin of victory

I have a simple 2-color map showing which candidates won in which precinct. Now I want to make one showing margin of victory within a precinct. So if candidate A won by a lot it would be dark green, ...
1
vote
1answer
67 views

Unable to show tiff “parameters”

Why this raster (tiff) does not have any values? Why I am unable to perform: doubleclick -> onechannel pseudocolor -> clafify Both rasters are downloaded from the same site: ...
2
votes
2answers
304 views

How to increase resolution of 3D image in GRASS NVIZ

I am trying to make 3D visualization of terrain data and orthophoto using GRASS NVIZ via QGIS. I have been able to import both the DTM and the orthophoto in NVIZ window and successfully draped the ...
0
votes
0answers
76 views

Custom infowindow exception in CartoDB

I'm building a runtime layer and til a couple of days ago my code was working. Since today it started giving me an exception that is causing subsequent code not to work. Uncaught ReferenceError: ...
0
votes
1answer
79 views

Does CartoDB support Retina screens?

We are using CartoDB as our production mapping solution. Just wondering does it offers support for Retina screens and if so how hard can be to toggle on?
0
votes
4answers
644 views

Unable to make infowindow work in CartoDB runtime layer

I'm trying to personalize a layer created with CartoDB. The layer is created at runtime and the problem is that I cannot make work even easy things like custom infowindow or legends or click ...
0
votes
1answer
289 views

CartoDB create layer at runtime

I'm almost totally new to CartoDB. I've been looking around and read the api reference, but there seems not to be what I'm looking for. What I want to do is to "Create visualizations at runtime". ...
0
votes
1answer
169 views

Export ArcGis Time Visualization

How come when I try and export my time series in ArcMap it compresses the video to 3 seconds? My time change visualization is at least 10. What can I do to make my exported video longer?
1
vote
2answers
174 views

Interactive Exports from GIS

I'm looking for suggestions of interactive exports from GIS software. The need for this research is that many of our customers either do not have access to GIS or the knowledge to use it. One method ...
1
vote
0answers
125 views

How to represent the time(weekly/monthly) variationof a polygon map using one image?

I have a base map made up of three hundred polygons, each polygon get lots attribute values(For example, each week/month get a value). But I want to draw only one picture(due to page limitation) to ...
6
votes
3answers
633 views

Should I use a discrete or continuous scale for coloring a chloropleth?

I am making a choropleth for an upcoming local race using D3. There are two candidates running for an election. For any given polygon on my map, if the red candidate has more votes, the color should ...
1
vote
1answer
112 views

How to create a value-by-alpha map in Java?

Someone has post similar question as mine before : similar question But my objective is slightly different. I have a shape file (.shp) (a country map) I would like to write a piece of java code to ...
2
votes
0answers
269 views

Why aren't my CartoDB map layers loading?

We have built our own instance of CartoDB on our servers, setup production environtment successfully. We can upload shape files, table and map view works great. When we trying to create ...
0
votes
1answer
570 views

How to use cartodb.js with API key for privacy of data

I would like to use cartodb.js in my web page reproduce a visualization that I created at CartoDB. But I want to keep private my visualization and data at CartoDB (and I am going to secure my web ...
1
vote
1answer
30 views

Is it possible to move a visualization to another table?

Is it possible to move a visualization to another table? e.g. when merging two tables, it creates a 3rd. OR to completely replace a table and maintain the viz?? I don't want to lose the original ...
0
votes
1answer
59 views

Zoom level lost in public visualization?

I've got a visualization made where in the back-end it looks great. zoom level = 5. Then any method of publishing sets the zoom level to 3. Can this be forced to remain 5? strangely, this other ...
-1
votes
1answer
145 views

Extracting area with a range of lat long?

Is there any online tool to extract a certain area with a range of lat long? I'd like to overlay some locations on a map. To do so, I need a map whose range is specified so that I can determine the ...
2
votes
1answer
144 views

Laz LiDAR files display extremely long thin line of points

I am having difficulty properly visualizing aerial LIDAR data from the csc.noaa.gov source. Taking any of the .laz files, the point cloud displays as an extremely long thin line of points. Zoomed in, ...
1
vote
1answer
186 views

Help me to visualize polygon and point data [closed]

As part of pilot project, we have collected basic/rudimentary Household survey in one district. We have both Polygon and point data.Attributes of the database include, No of people living in the ...
1
vote
1answer
165 views

What is the best way to display point data (with standard deviation) using QGIS/SAGA/Manifold? [closed]

I would like to display point data values (indicating biomass at a point) but also to show the standard deviation value for each point. What would be the best method to do this in QGIS (I'm a basic ...
1
vote
0answers
31 views

Display Dolfin XML in Web Browser?

I got a mesh as Dolfin XML and would like to know if there is anybody that had some experiences with the web visualisation of it. Is it possible to convert in X3D?
3
votes
0answers
63 views

How to recreate past landscapes on ArcGIS 10.1? [closed]

I am trying to recreate the landscape as it may have been around 4000 BC. I have an idea about what tree species existed in particular regions of Scotland (by reading pollen studies). Now I need to ...
9
votes
5answers
3k views

Viewing LiDAR data from web browser?

I am looking to host lidar data on my own server and give clients the ability to view that data through a web browser as a 3D point cloud (file would be in .las format or equivalent), possibly with ...
1
vote
0answers
33 views

QGIS rule-based point style responding to number of co-located objects? [duplicate]

I am mapping the geolocated location information for 5.5k Twitter profiles as point data. Many of them have the same location ie "London, UK" meaning that they return identical coordinates. On the map ...
1
vote
0answers
53 views

Shapefile wrong visualization [closed]

Just passed from 1.8 to 2.0.1. Opening a previous format project, some layers are visualized only at [each time] different scale; visualized at 1:313593 only if "zoomed at layer extension", otherwise ...
1
vote
1answer
290 views

Editor to work on GML files

I am looking for a good way to work on GML files and would appreciate some personal experience. At the moment I am using nXML or SGML mode for Emacs but I wouldnt mind having an IDE/Emacs mode/... ...
3
votes
0answers
140 views

Linux Tool to visualize CityGML file

I am looking for a linux program that allows me to visualize CityGML models (3D). I have tried a whole bunch so far (most of them via wine but also native ones) but I couldn't get a single one of them ...
1
vote
1answer
646 views

data frame visibility - on/off like layers in arcgis 10

I have two or more data frames in the table of contents area. Is there a way for changing data frame visibility in layout view of arcgis 10? I mean, similar to layers having option of on/off. I have ...
1
vote
1answer
277 views

Developing visualization on zip code level data

I'm trying to use the zip code data from the census (any year that works). I have 5-digit zip code data that I need to match up to a map/shape file. The problem is that the zip code tabulation files ...
2
votes
1answer
94 views

Is it possible to display two categorical symbolizes for two different attributes in one layer alongside each other in ArcMAP 10.1?

I have a road layer that I would like to display attribute_1 = "speed" on top of the line segment and attribute_2 = "traffic_volume" below the line segment. For each attribute I would like to setup ...
1
vote
1answer
152 views

Visualise data belonging to an area

I am looking for a way in QGIS (1.8.0) to visualise data, which is related to an area (polygon on a shape file). There are no x-y-coordinates with the data, just the info of the belonging area, means ...
0
votes
1answer
90 views

Why does my zoomToExtent zoom to 0,0?

In this map I have added a line of code to make it zoom to the vector layer: map.zoomToExtent(vector_Layer.getDataExtent()); This zooms in to the maximum zoom at the point in the Gulf of Guinea ...
0
votes
1answer
115 views

How to visualise “distance from amenities”?

I'm interested in calculating for every point the distance to the nearest amenity of each of a certain number of types (train station, supermarket and so on). I think the calculation will be ...
3
votes
0answers
122 views

How to visualize fuzzy/approximate locations

I need to visualize a mixture of accurate and fuzzy/approximate locations on a web map. The user should be able to instantly recognize approximate locations from the marker used. Are there any best ...
2
votes
1answer
1k views

How to create a visualisation of the world's aeronautical flight paths?

I am a sculptor making a world globe art project, and I need a still image of the whole world’s actual air traffic routes to use as reference material. To be clear, I’m not looking for the ‘air ...
2
votes
0answers
81 views

Visualize given temperatures on image/map/plane

I am looking for a way to visualize some data of the form : latitude longitude temperature as image(s). Have many of these 3-tuple lines uniformly distributed on a region. Ultimately, I am looking ...
2
votes
1answer
59 views

What special property do mathematical functions and physical surfaces have that is appropriate for the case of surface plot?

In the definition of surface plots in my book, (An introduction to data mining, chapter 3) it is said that: Surface plots are often used to describe mathematical functions or physical surfaces ...
25
votes
3answers
9k views

Simple thematic mapping of shapefile using Python?

I wish to visualize geographical data in Python, without using ArcGIS/ArcPy, and make a map. On the internet I found how to make a thematic map using Python: Here is some code that I tried: ...
10
votes
5answers
6k views

How can a 3D model of a building be displayed in a web-browser?

I would like to try to show a proposed building in a web-browser such that the user can interact with it in a way similar to google maps streetview. Is it possible to do this, in any platform? I can ...
1
vote
1answer
481 views

Flow mapping visualization using a road layer

I am trying to illustrate travel using a flow map on a road layer. My data is: city of origin destination number of travelers I would like to use a polygon city layer (or point) and a road layer, ...
5
votes
1answer
155 views

How to design class breaks for a time series of choropleth maps?

I'm working with a time series of choropleth maps showing the same indicator for the same administrative boundaries, but spanning period of nine years. What would be the most appropriate strategy of ...
1
vote
0answers
67 views

3D tool for a visual analysis

Given a 3D mesh I need to visualize and analyze properties and elements generated from the object such as: tensors coplanar/similar elements ( coplanar faces, aligned vertices, etc etc, 3D geometry ...
0
votes
1answer
100 views

Why can't I load more than 12 elevation files into NVIZ?

I have a large set of rasters in a GRASS mapset, which I would like to use as frames in an animation, visualizing the raster data as elevation. NVIZ is an obvious tool for this, but I'm having trouble ...
1
vote
1answer
355 views

ArcScene 10.1 Orthophoto Visualization Issue

I am attempting to visualize an orthophoto in ArcScene 10.1 at the same resolution it is at in ArcDesktop 10.1. I have set the "Quality enhancement for raster images" to it's highest extent. But, the ...
5
votes
3answers
1k views

How to drape a simple jpeg image over dem of some area?

How can we drape a simple jpeg image which doesnot have any geo referencing information over the digital elevation model in order to visualize it in 3D in QGIS?
3
votes
2answers
169 views

How do I visualize a time and space sequence of events in ArcGIS?

I would like to visualize this scenario: I have 5 weather stations. I would like to present a sequence of rainfall events for them. For example, rain was starts at station 2 at 6:09 and then went to ...
14
votes
3answers
415 views

Is it possible to use symbols instead of colours to visualise raster cell values?

I have a raster image (GeoTIFF) with integer values. I know how to visualise raster values in QGIS using colormaps or similar, but I would like to assign symbols to each colour value instead - just ...
6
votes
1answer
247 views

Fast data representation on the vector layers

I have found an interesting article about how HTML5 supports representation on large datasets. Article can be found here. In the article it is said that HTML5 and feature simplification can ...
6
votes
2answers
2k views

Building cartograms using Web GIS?

I would like to build a cartogram map using Web GIS. I have a basemap and a set of raw data in excel. I wondered what are the steps to build up a cartogram map using Web GIS? Note: Originally ...
2
votes
1answer
281 views

automate color palette generation?

I frequently am in need of color gradients that aren't readily available through ArcGIS or the ColorBrewer add-in. I find the process of manually creating gradients in Arc very tedious: saved custom ...