The representation of data in a viewable medium or format

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1answer
100 views

How to create multible labels non-ovelaped in CartoDB?

I'm trying to make a map poiting the cities I've visited for work, in each city I've visited more than one place. Those places are my labels, bur they are overlaped. If I choose label overlap = false, ...
2
votes
2answers
278 views

What can be used to drape an High res Image over a DEM and get high quality results?

I have a High resolution Georeferenced Orthomosaic, as well as a DEM of that area. The pixel size of both is 20 cm. The data is in Tiff format. I tried to drape the Image on the DEM in ArcScene, but ...
2
votes
1answer
172 views

UTM Coordinate Mapping Across Zones

I am building an application that requires me to plot UTM coordinates on a chart using CSV data. I am given two UTM coordinates for each record, although I would like the application to handle zone ...
2
votes
2answers
218 views

Create a layer selector when making a map at runtime for CartoDB

Using the same theory to create a search box at runtime, (such as here), I wrote this code: var l = cdb.vis.Overlay.create('layer_selector', map.viz, {}) l.show(); $('#map').append(l.render().el); ...
1
vote
1answer
245 views

CartoDB - Method to show/hide layers for hatching overlap for > 4 layers?

Our goal is to show/hide individual hatched maps. Unfortunately we have more than the 4 max layers allowed in a viz. We successfully made and example where we show/hide the 4 layers in a viz: http://...
14
votes
3answers
875 views

Using GIS tools for non-geographical problems

Many other fields have visual/"spatial" problems that can potentially be solved with GIS tools. I know I've used GIS tools for the odd non-geographical task and was wondering how much this happens and ...
5
votes
1answer
211 views

Standard colour ramp for wave height visualisation

I'm working on a visualisation of weather, including wave heights. The source data is from a WaveWatch 3 model, and I'm using GeoServer 2.7 (with NetCDF and dynamic colormap extensions) to do the ...
0
votes
1answer
270 views

CartoDB - can we overlay 2 visualizations

Suppose we make two map visualizations from a loaded polygon shapefile in the CartoDB free online system. Could we overlay these 2 maps on top of each other in a web page using the CartoDB.js API? ...
3
votes
1answer
334 views

Shapefiles not showing in OpenLayers using QGIS export to OpenLayers 3 plugin?

I am new to GISs in general and I am working with QGIS to generate layers to be shown on OSM using OpenLayers. My problem is the following: I have multiple layers in a QGIS project and I want to ...
1
vote
1answer
78 views

Cross information in ArcGIS for Desktop?

I'm a total amateur at ArcGIS for Desktop, this is the first time I use it for real. The thing is I have several shapefiles with information about: Schools in my city (elementary, middle and high ...
-1
votes
1answer
101 views

Best program or tool for visualising big data sets really fast 10-20 GB data if the users don't know squat about GIS? [closed]

I have between 10-20 GB various GIS-data that there is a need to set up och and visualise for various users who want to be able to pan, zoom and switch between various layers and groups of layers ...
1
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1answer
101 views

Visualisation of “dominant” point in each location

I had an idea for a kind of visualisation, and I'd like to know if it's been done before, what it's called etc. Basically it would visualise a single numerical quantity that varies greatly, at ...
2
votes
1answer
152 views

Mapping datapoints over several floors of a building

I'm new to web mapping and am planning and investigating ways on how to best plot and visualize user flow through a building across several floors. We are planning on tracking users location based ...
1
vote
2answers
248 views

How to visualize pgrouting result?

So I use this query SELECT seq, id1 AS node, id2 AS edge, cost FROM pgr_dijkstra(' SELECT gid AS id, source::integer, target::...
1
vote
0answers
47 views

Why does no data show up in the embedded CartoDB map? [closed]

It seems something went wrong with CartoDB. Recently I am trying to embed my visualization into my website. But only comes with a blank map. Then I noticed that the live example from the official ...
3
votes
2answers
329 views

How to build a map that highlights only one state?

I'm a journalist working on maps of several Alaska databases. I'm learning as I go and have a question that's probably very basic, but very important for my projects: Using CartoDB, how can I create ...
4
votes
2answers
766 views

How to build cylinder or cube multipatch objects in ArcGIS?

I'm trying to visualise a series of boreholes, which consist of points on the ground surface, and soil sample values taken at 0.01m depth intervals (in a related table). eg in this screenshot, I've ...
5
votes
0answers
643 views

QGIS 2.4.0-Chugiak: How to threshold NDVI to calculate emissivity for land surface temperature

I am analysing urban heat island using thermal band 6 of landsat TM-5 sensor with respect to Normalized difference vegetation index that derived from the Band 3(Red) and Band 4(NIR). Lansat TM years ...
4
votes
2answers
1k views

Setting layer visibility in QGIS Python API

Im having a problem toggling the visibility of map layers in pyqgis (2.4). I have a simple interface, just the map canvas, no legend, and basically a radio button that toggles between two raster ...
2
votes
0answers
87 views

How to clearly display a huge shapefile with many point features?

I have two vector shapefiles, each with 54,000 features. When it's zoomed in on a small region, I can clearly see the feature colors: but as I zoom out, this is what I get: Any suggestions on ...
4
votes
2answers
517 views

Visualization of a field in Leaflet

In a Leaflet app I want to overlay raster data (technically speaking, a field) on a web map. The data consists of triples < lat,lon,value >, where value is in range [0,1], for example: 23.33,10.55,...
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0answers
24 views

Tools to generate all the possible geometries meeting specific constraints

I have an area = 2d polygon (generally a 4-side shape). I would like to generate all the possible rectangles matching the following constraints: that fall within the surface of the area with a ...
1
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0answers
66 views

What kind of methods are most commonly used to interpolate a relief?

I have got a topographic plan with height measurements which I converted to point shape file with height value in attributes. I was wondering, what kind of methods are most commonly used to ...
1
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0answers
67 views

Tutorial on creating geospatial visualizations with Processing(.org)?

Recently, I've seen examples, (lots of examples ) which use Processing(.org) for creating network visualizations. So far though, I have not been able to find any good tutorials on it. I was wondering ...
1
vote
2answers
264 views

how to display movements of a moving object in cartodb

I have few GPS tracks with lat long and timestamp. I want to present them on a map and to show how the movement took place using the time series location values (X,Y,T). I searched a lot but could not ...
2
votes
1answer
203 views

How to make a 3d visualisation of different peat layer to show the height of each layer?

I have bore hole point data that has about 5 to 7 types of peat layer and also has several depths. I also have digital elevation data of the area. I need to interpolate these layers separately, then ...
0
votes
1answer
37 views

Why did my Visualization tools disappear from the CartoDB Sidebar?

I was working with the "Intensity" visualization tool yesterday. Using the same data, I created a new map, and now I can only access: Simple, Choropleth, Category, and Bubble. Where did Intensity, ...
0
votes
1answer
61 views

Link to an individual info window in CartoDB?

I'm a new user, so thanks for your patience and assistance. I just published a very large parcel dataset on CartoDB. Another website would like to link their parcel dataset to ours. Meaning, if you ...
2
votes
1answer
51 views

Setting colour on point cloud data from raster

I was reading this article: 14 ways to take charge of lidar data. Number 12 states that you can change the colour of your point-cloud data by using a raster image. Does anyone know the process for ...
3
votes
3answers
2k views

Black/white hatching pattern fills in QGis

I am looking to replicate black & white maps in QGis, using hatching patterns and greyscales to indicate different categories of a continuous variable (example below). It is possible/...
1
vote
0answers
117 views

Which bins should be used for demographic data for a choropleth map?

I'm currently working on a project which produces a choropleth map similar to a map like this: http://dl.dropboxusercontent.com/u/54512470/Telefondaten_VIZ/index.html That map has 2x5 classifications ...
1
vote
1answer
321 views

generic “There is a problem with your connection” error in CartoDB

I changed the cartoCSS for a visualization, but in a pretty straightforward way (fyi: changed some numerical cutoffs to other numbers, did not touch anything else). I am getting a "There is a problem ...
11
votes
4answers
2k views

Looking for a free program for 3D visualization

Looking for a free program or web software for 3D visualization. I'd like to have an ArcScene like abilities. No editing needed, just need to see the data in a 3D format. It'd be really helpful for ...
2
votes
2answers
3k views

How to plot geoJSON using Python?

I have huge geojson file that I am working on: [{ "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ ...
2
votes
2answers
172 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
74 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: www....
2
votes
2answers
436 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
98 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
131 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
1k 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
427 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
319 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
259 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
151 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 has lots of attribute values(For example, each week/month get a value). But I only want to draw one picture(due to page limitation) ...
7
votes
3answers
928 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
160 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
412 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 ...
1
vote
1answer
971 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
32 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
62 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 ...