Satellite Sensors & Resolution
Monday, October 11th, 2010
Nice resumé of current satellites and their characteristics.
Archive for 2010
File Downloader
Thursday, October 7th, 2010
Neat utility (also with Firefox plugin) to download a bunch of files via HTTP from a server.
Citation Strength
Tuesday, October 5th, 2010
This visualization gives an overview of the whole citation network. The colors represent the four main groups of journals, which are further subdivided into fields in the outer ring. The segments of the inner ring represent the individual journals, scaled by Eigenfactor™ Score. In the initial view, the top 1000 citation links are plotted. Line size and opacity represents connection strength.
Map Your Moves
Tuesday, October 5th, 2010
Nice visualization of people moving from one place to another.
Statistical Mapping
Friday, October 1st, 2010
Nice Web GIS application from the swiss government.
Data Visualization (Compact) Video
Thursday, September 30th, 2010Putting Into a New Dimension
Tuesday, September 28th, 2010
The concept behind BBC Dimensions is relatively simple: take a specific important place, event or ‘thing’, and overlay these artefacts onto a map of one’s local neighborhood.
TED Talk: Rachel Sussman: The world’s oldest living things
Tuesday, September 21st, 2010Short Interview
Tuesday, September 7th, 2010
Just to bookmark it somewhere… Interview at WebValley 2010…
Data Converter
Tuesday, September 7th, 2010
Takes CSV or tab-delimited data from Excel and converts it into several web-friendly formats, include JSON and XML.
Boxplot
Thursday, August 26th, 2010
Great script (in CSS and Javascript) which makes it really easy to display boxplots on a website. Great!
Excel: Concatenate Multiple Fields
Tuesday, August 24th, 2010Wonna concatenate numerous fields to obtain all values in a single cell? Here’s the script:
Sub ConcatenateAll()
Dim x As String, rng As Range, cel As Range, v_new As Integer, v_old As Integer
With ActiveSheet
Set rng = .Range("F2:F2736")
For Each cel In rng
v_new = Int(cel.Value)
If (v_new <> v_old) Then
x = x & "," & Int(cel.Value)
End If
v_old = v_new
Next
.Range("G2").Value = x
End With
End Sub
And in order to insert a little bit more complicated string in ArcGIS’s Field Calculator, you need to do this:
"<img src='http://localhost/graph.php?data=36,36,37," & Int([wohnfl_per]) & "' />"
ArcMap: Convert a value to NoData (IsNull)
Tuesday, August 24th, 2010Easy, easy… In Spatial Analyst -> Raster Calculator do:
isnull([My Raster] <= 0, [My Raster])
ArcMap: Raster Data
Tuesday, August 17th, 2010Just working with some extensive raster data sets. And running into a problem – that is, the values of the raster, although integer, are not being displayed. Here is a solution:
Use the “Build Raster Attribute Table”. And if an error is coming up concerning the reaching of a limit, then use the advanced settings utility has an option to set maximum number of attribute entries.
The utility should be in your install location in the Utilities folder (by default – C:\Program Files\ArcGIS\Utilities). Run the AdvancedArcMapSettings executable and select the Raster tab.
Debugging AJAX
Monday, August 16th, 2010Need to debug AJAX? Beside some tips I found on the Net, here is one I found particularly useful, at least in my current case. Just use a
tail -f /private/var/log/apache2/access_log
Or
tail -f /private/var/log/apache2/error_log
which displays the latest log entries… which can help to solve some major issues.
Solartaxi
Monday, August 16th, 2010Great project. Traveling around the world with solar energy. Wow!
Air Traffic Visualization
Sunday, August 15th, 2010Great visualization of 24 hours of air traffic. Shows well, similar to the Nightlights of the Earth, which regions of the globe are not connected. Impressive!
Nightlights of the Earth
Sunday, August 15th, 2010
Population Distribution
Friday, August 13th, 2010
Attractive and interesting way to sum up the global population.