Archive for the ‘Blogroll’ Category

Zoomify, Virtual Earth, Yahoo Maps, Google Maps, OpenStreetMap and Bluemarble all in one AS3 flex library

Update: now includes Mars and Moon. After some thinking on how to integrate the code for linearly-projected maps (zoomify …) and mercator-projected maps (almost all others) into a single AS3 model, i found a very good, easy and straight-forward architecture. The trick was to separate the coordinate conversion into two steps: linearisation and linear interpolation [...]


Creating Real “Multi”-Layer Maps

Doing another viewer for a 200+ maps project, i discovered that combining overview and detail maps in the same view, rendered the system unusable with only a few layers. Naturally i did some optimizations on the layer drawing code. This resulted in a dramatical performance improvement when combining large overview maps with detail maps in [...]


Serving RDS/TMC info via GeoRSS

As RSS and GeoRSS get more popular every day, here are my 2ct: Once again recycling old code: pulled my RDS/TMC decoder out of the drawer and made a running setup. Then wrote a simple script to generate a GeoRSS feed from it. The hardest part is getting the traffic information formatted right: having a [...]


Scientific imaging with AS3 maptech-lib

Just a quick note: received a request to use Maptech on microscopic images. Threw together an adapted client. The original demo is no longer available. Please see the enhanced demo. A server-side script scans for directories holding zoomify images, sorts them lexically and adds then to the client in sort order. Zoomify’s ImageProperties.xml is extended [...]


2-d barcodes

When thinking of a mass-licensing mode for MaSSOnAIR i thought of a barcode (as there are webcam barcode readers for flex). Then i remembered semacode, a way to encode a url in a 2-d barcode. When i did some research on the technique, i found that semacode actually is a Data Matrix implementation Data Matrix [...]