GPU accelerated visual analytics

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.

 

 

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Flyover mode in MapKit with WMS

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;

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Overlay WMS on 3D maps on iOS

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:

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iKatastr2 aktualizace na App Store

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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 :)

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Hybrid vs Native

It has been a while since my iOS native development. Just came across this report on the subject of native vs hybrid : Native vs Hybrid . Interestingly enough I have expected clear recommendation for hybrid as today devices are more capable of handling rich HTML/JavaScript content and iOS native bridges enable nice integrations with these two worlds.

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PC web vs. Mobile app usage

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.

ikatastrSessions

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Google Trends – close to reality ?

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

 

googlwTrends

..let’s look on another measure – site visits using simlarweb.com

similarweb

similarwebmango

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  ?

 

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Průkopníkům

…před 20 lety jsem tuto knihu  našel na stole v jednom starém, opuštěném  domě v Brně, dodnes se k ní vracím jako k pokladu…

pujdeto

Breviář PŮJDE TO ! ING J. SOLAR, Praha 1938, 3. vydání

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iKatastr.cz 20M clicks

First time 100K visits over month period.  20M clicks & reaching 3M sessions overall.

 

bitlystat

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Joy of Open Source

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.

Screen Shot 2016-02-02 at 23.16.13

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 ? :)

 

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