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Written by Eric Pimpler
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Monday, 23 August 2010 10:57 |
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This article was previously published on GeoChalkboard, and has been reproduced here with permission. GeoChalkboard is published by Geospatial Training Services who provide a range of geospatial web courses.
In the first article in our series on the ArcGIS Server API for Flex we covered some basic concepts including how to create maps and add layers. We covered both tiled and dynamic map service layers. In this brief article you will learn how to apply a definition expression to your dynamic map service layer to restrict the features displayed from a layer. For instance, in the figure below we are plotting only those counties that suffered a population loss from 2000 to 2007.
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Last Updated on Monday, 23 August 2010 11:06 |
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Written by Richard Marsden
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Monday, 19 July 2010 08:40 |
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GeoCommons is provided by FortuisOne and builds on their software products to provide a free and public community service. GeoCommons currently provides two easy-to-use free services based on open source and other freely available datasets. GeoCommons Maker is a simple point-and-click map creator that does not require programming experience; and GeoCommons Finder is a data uploading and sharing service with some basic geocoding abilities. Although these tools are remarkably easy to use, GeoCommons Maker makes the mistake of using the Mercator projection for geospatial data visualization. |
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Written by Brian Kachnowski
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Monday, 21 June 2010 09:25 |
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de/numerics have released
a web service for creating heatmap translucent
color overlays of geographic-based data on Google maps. No programming is
required, but this service can be accessed using a PHP API. This article shows you how to use this service using the PHP programming interface. |
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Last Updated on Monday, 21 June 2010 10:02 |
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Written by Richard Marsden
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Monday, 17 May 2010 08:58 |
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The iPad makes a very tempting platform for geoweb applications. This a short post on my initial findings after a week of using 3G iPad. I intend to follow it with further articles and commentaries over the coming months. Executive summary: Should make a great platform, but current geoweb support is limited. |
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Written by Eric Pimpler
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Monday, 05 July 2010 08:19 |
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This article was previously published on GeoChalkboard, and has been reproduced here with permission. GeoChalkboard is published by Geospatial Training Services who provide a range of geospatial web courses.
Today we are beginning a new series of posts on the ArcGIS Server API for Flex. The ArcGIS API for Flex allows the creation of Rich Internet applications on top of ArcGIS Server, and is based on the free Adobe Flex framework. The Flex framework is a client-side technology that is rendered by Flash Player 9 and above, or by Adobe AIR.
The term Rich Internet Applications or RIAs has become synonymous with Web 2.0 applications. But what are Rich Internet Applications? RIAs provide desktop functionality in a web application. They are engaging, interactive, and expressive applications with easy to use interfaces. RIA provide increased productivity to end users. There is no waiting for full-page reloading after user actions. Instead, RIAs provide instant feedback to the user and are responsive to their actions. In GIS terms, RIA applications provide the ability to create attractive visualizations of geographic analysis, and the ability to interact with the data.
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Last Updated on Monday, 05 July 2010 08:35 |
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Written by Richard Marsden
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Monday, 31 May 2010 08:42 |
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Previously I have demonstrated how to use Microsoft Research's MapCruncher tool to create map tiles from custom bitmaps for Bing Maps (nee Virtual Earth). That particular example used an ASTER satellite image for the EcoMapCostaRica.com project, and hosted the map tiles on Amazon's S3 service with delivery using Amazon Cloudfront. Although MapCruncher was intended for use with Bing Maps, the resulting tiles can be used for custom applications and with map APIs from competing companies. This article shows you how to use MapCruncher tiles with Google Maps. |
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Written by Richard Marsden
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Monday, 03 May 2010 07:23 |
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The aim of OpenAddresses.org is to establish a copyright-free database of geocoded addresses, using donations and voluntary help. Such a database has a wide range of applications including spatial analysis and geomarketing. The database is intended to be of greater accuracy than navigation systems which typically have insufficient accuracy for microgeographic analysis. OpenAddresses includes a user web interface and a number of REST services. Data is typically hand-digitized or donated by institutions and public authorities. |
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