Blog | Gephi, open source graph visualization software - Part 4 Community ~ gexf gexf4j Francesco Ficarola is a Computer Engineer and a Ph.D. student at the Sapienza University of Rome. In addition he is been working for an Italian company as R&D Engineer for one year. His main research interests are Wireless Sensor Networks, Social Networking and whatever concerns “Internet of Things”. Gephi supports the 1.2draft of GEXF file format since version 0.8. Until now, if you are a Java developer, you couldn’t use any up-to-date Java library to manage this version of the format. The latest version of gexf4j (currently 0.3.1) supports new XML attributes and data types to encode dynamic networks: timeformat or spellopen intervals (startopen/endopen)doubledatexsd:dateTime In addition, the javadoc has been added and all methods have now meaningful names for their parameters. Checkout code Rungit clone Report issues Simply go to the Issues tab. Have a nice “GEXF graph”! Francesco Ficarola (gender == "male").color = blue
Hillshading References: Digital Terrain Modeling *Burrough, P.A. (1986), Principles of Geographical Information Systems for Land Resources Assessment. Oxford: Clarendon Press. Chapter 3: Digital Elevation Models. *Brassel, K.E. (1974), "A model for automatic hill shading," American Cartographer: vol. 1(1), pp 15-27. Brassel, K., Little, J., Peucker, T.K. (1974), "Automated relief representation: a comparison of different display methods," Map supplement No. 17, Annals, Association of American Geographers: vol. 64(4), pp 610-611 and separate folded map. *Clarke, Keith C. (1995), Analytical Computer Cartography, 2nd Edition. Horn, B.K.P. (1981), "Hillshading and the reflectance map," Proceedings IEEE: vol. 69(1), pp 14-47. *Imhof, Eduard, edited by H.J. Lehmann, J.G. (1799), "Darstellung einer neuen Theorie der Beziechnung der schiefen Flachen im Grundriss oder der Situationsziechnung der Berge," Leipzig. *Lewis, P. (1992), "Introducing a cartographic masterpiece: a review of the U.S. *sources used to compile notes Return to hillshading page
Fantastic Maps - Fantasy maps and mapmaking tutorials by Jonathan Roberts Learn how to code in Gephi For developers only. If you're looking for Gephi, click on Learn. The Gephi Development Center is a repository of code, collection of builds, and a library of API references all designed to help you extend Gephi's functionalities and build new cool applications upon Gephi Platform. New to Gephi Development? Start here if you are new to Gephi Development. API References Current Javadoc » These documentation files may be outdated compared to the development trunk. Business API are available to make plugin development really easy: Toolkit The Toolkit project packages essential modules (Graph, Layout, Filters, IO…) in a standard Java library, which any Java project can use for getting things done. Read more » Plug-in Bootcamp The bootcamp is a large set of plug-in examples to guide developers create Gephi plugins easily. Read more » Wiki The Dev portal shares everything about the core development and related projects specifications, beta testing and releases. Bug reports Feature requests Mailing Lists
Geo-innovations Products & Services: Panoramic Maps how a Laplander or and Eskimo sees the world? Imagine what it would be like if the seas suddenly dried up, and we could walk across the ocean floors. We would see great chasms, deeper than Everest is high; volcanoes bubbling over the ocean floor, some so high that they poke their noses out of the water. Perhaps we would also see the scars left behind as the earth has torn itself apart over the millennia. Imagine the sheer majesty of the Andes mountains, shrouded in mist, and so sharp and steep that snow cannot settle in many places. Imagine what it would be like watching the Australian landmass thundering northwards, riding over the Pacific Plate and crushing all before it: as will surely happen one day. Imagine the past, and realise the effect that physical features had on world history.
Mapping: Hand drawn maps tutorials I have been working on the map for a world for a time now and have been stumbling across lot of nice tutorials on how to draw the different elements and how to make it look the way I want. So I thought I would share some of them with you. Drawing Isometric RiversDesigning a TownDrawing SwampsDefining Scale Using MountainsDrawing coastal WatersDrawing Realistic CoastlinesConverting a Phone Photo to Digital Line ArtHow To Draw ForestsDrawing Isometric Cliffs3 diffent types of cliffsIsometric MountainsDrawing an original fantasy map That's all for now. Now I'm off for a night of solo gaming with Mr.
Announcing MapBox Streets: A Global Map with Street Level Detail By Dave Cole We’re excited to release MapBox Streets, our first global block-level map powered by OpenStreetMap. MapBox Streets makes it incredibly easy to get a beautiful, fresh street map on your website or mobile application in place of Google Maps. Get started now using MapBox Streets with a free account from MapBox, or with any of our monthly plans for higher usage and bulk support. For a step-by-step walk-through of how to use MapBox Streets in your web application, see Get Started with MapBox Streets. Powered by open data OpenStreetMap is a wiki-style geographic database with 2.7 billion GPS traces from over 545,000 registered users. OpenStreetMap is open for anyone to contribute, which has proven critical, even in situations of crisis response. Fresh design We wanted to design a map that was flexible enough to be the right choice for a variety of use cases. What’s next
Cross-blended hypsometric tints {*style:<b>Discussion </b>*} Seeking to differentiate elevation zones clearly and/or to design attractive maps that are more marketable, cartographers have designed countless hypsometric color schemes over the years. They generally employ lighter values at higher elevations and darker values at lower elevations. Although no better color exists than blue-green for graphically recessing lowlands on maps, it is problematic because of its strong association with well-watered climates and vegetation. Hypsometric tints for higher elevations continue to mislead map-readers about climate and natural vegetation. Misleading associations between elevation colors and natural vegetation afflict even the classic hypsometric tints developed by Eduard Imhof and Karl Peuker (Figure 2).
Screensaver - visualizing the global blogosphere Twingly Screensaver Beta Twingly screensaver is visualizing the global blog activity in real time. Forget RSS readers where you see only what you're interested in. With Twingly screensaver you get a 24/7 stream of all (viewer discretion advised) blog activity, straight to your screen. To use the screensaver you need a PC with Windows and a graphics card supporting OpenGL. How to install: Download the installation files by clicking the download button. To use Twingly as the system screensaver: Right click the desktop. History of Cartographic Depiction of Terrain The following discussion was derived in large measure from Cartographic Relief Presentation by Edward Imhof. (See references page.) This text is by a master of manual cartographic methods and is highly recommended for the electronically oriented. This is where you will find the figures referenced here but which were left out due to copyright issues. The depiction of the land surface features have been a challenge for map makers ever since the earliest maps.Some of the oldest maps show mountains as rounded `mole hill' or triangular shapes as they might appear if one were looking at them from the level of a valley. See figures 1 and 2. The simple rounded dome shape which resembles a mole hill was the most common early cartographic form of a mountain (Figure 3a).These simple shapes were often arranged, even in the earliest maps in row or chains, and often aligned with the axis of the row (Figure 3b). The height difference between contours is called the contour interval.
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