Recent months I had lot of fun working on WebGL component called “mGL” for visualizing and filtering large amount of data in the browser. It has been used for Incident Analyzer and Area Analyzer Smart M.Apps. Here are 2 videos of the testing app of the mGL that shows its potential. Most interesting is the filtering part that takes place in the fragment shader. mGL itself has API that can connect to crossfilter to control filtering or has adapter to be used with dc.js.
First video shows 400k parcels in Cincinaty and second 400k road network in North Caroline. Both with fast cross-filtering on several attributes. You can switch between dimensions represented by charts by clicking on their label. Map (road network) will reflects chart’s color and immediately response to changing filters on either chart or on map.second video shows 400k parcels in Cincinaty with the same behavior.
Suprise, iOS 9 MapKit finally enables flyeover mode with WMS overlays ! I have used my github MapKit sample and only set in MapViewController mkMapView.mapType = MKMapTypeHybridFlyover;
After more than 3 years it still amazes me how good is myVR technology for 3D maps on iOS. Watch Czech Republic DMT with CUZK orthophoto as base map and cadastral or geography WMS overlay:
Posted in iKatastr, iOS
Tagged 3D, iOS, myVR, WMS
iKatastr2 update je na App Store ! Diky všem, kteří jej používají a podporují tento projekt. Těší mě, že se aplikace hojně používá – a to byl také hlavní důvod aktualizace aplikace.
Tento update je udržovací – obsahuje rekompilaci na nejnovější iOS a zároveň stále podporuje iOS od verze 6. Byla aktualizovaná knihovna Google Maps SDK a opraveny drobné chybky. Můžete zde napsat své názory, komentáře a ještě lépe přímo na App Store iKatastr2 ocenit – to je jediná měna, kterou můžete za aplikaci, která je zdarma “zaplatit” – a věřte, že každý pozitivní ohlas dodává vývojáři palivo, smysl a chuť v tom pokračovat a třeba i něčím novým překvapit :)
Posted in iKatastr
This chart shows real usage (sessions) of iKatastr app over 5 years of running as app on iOS, Android and on PC as web page in CZ. Tiny Windows Store app and Windows Phone app usage couldn’t be rendered at all.
or no ? … how to explain this picture ? iKatastr was indeed attempt to introduce new term for accessing cadastral data in Czech Republic, and it launched on iOS, Android and web 5 years ago, no public advertising, no ads at all… Anyway I like this picture, and it is kind of surprising that GISCloud nor mangomap doesn’t enjoy the same level of trending according to Google Trends. I think reality is different
..let’s look on another measure – site visits using simlarweb.com
Looks like Google Trends takes into consideration # of visits and is more weighted than media coverage ? Or does the mobile presence of app iKatastr adds so much ‘ads’ to the final chart ?
…před 20 lety jsem tuto knihu našel na stole v jednom starém, opuštěném domě v Brně, dodnes se k ní vracím jako k pokladu…
Breviář PŮJDE TO ! ING J. SOLAR, Praha 1938, 3. vydání
First time 100K visits over month period. 20M clicks & reaching 3M sessions overall.
*** update IV/2017: from comment below, check this great raster plug-in from Victor Veralde Gutiérrez too: https://github.com/IHCantabria/Leaflet.CanvasLayer.Field/ ***
I have got great, absolutely amazing joy today from my own open source experiment. In 2014, nearly 2 years ago, I have published on GitHub (gist) L.CanvasOverlay a small class to handle generic drawing on top of Leaflet, I was thinking let’s try to contribute back to the open source with this little snippet – I thought would be useful so I have added little description. Original blog post here: https://blog.sumbera.com/2014/04/20/leaflet-canvas/
After few months later I found it is used on http://windyty.com one of the best 2015 geo-visualization with huge popularity. It is a small part of this great app, but makes me feel so good like I am part of it, I am looking on something where is my small piece, small share…meaning of the effort, sense of publishing and open sourcing.
And today I have got echo it is used also in Marine National Facility here: http://www.cmar.csiro.au/data/underway.test/
This makes me so happy … and just came across this quote : “Revenue is a lagging indicator, usage is a leading indicator,” can’t remember, who just said that ? :)