iKatastr enables to view cadastral information in Czech Republic and view the owner of the parcel/building.  I would like to mention here few technical details – iKatastr is actually less programmed but more configured. iKatastr on mobile uses Universal Map Format that defines the data sources for map composition and the query request when tapping on-screen. iKatastr in web do the same thing, it uses JSON definition to read full map composition. Moreover web version is linked with MapShake where the configuration of the map can be authored, verified, shared with friends and even you can generate your own iKatastr map as HTML page. the map you see on www.ikatastr.cz is the same that is stored on Mapshake here : http://www.mapshake.cz/549-iKatastr . To generate map similar to www.ikatastr.cz you need to press the <html> button   in the lower left corner to get this page: http://www.mapshake.cz/mapjs.aspx?i=549 from where you can copy/paste the full JavaScript stack to regenerate map on your side.  In the generated map you can also find this linked JavaScript : http://www.mapshake.cz/mi/549.js that is used  by www.ikatastr.cz.

So the bottom line is : do not programme, rather  generate / configure your maps !


Mapy.cz na iPhone- video

Seznam pracuje na verzi Mapy.cz pro iPhone.  Prozatim ukázal pouze screenshoty… např. zde http://www.iphonetips.cz/apple-novinky/mapy-cz-pro-iphone-exkluzivni-obrazky-z-betaverze/ , které ovšem vypadají velice  slibně. V rámci vývoje Whatevermap 2.0  se vyzkoušel prototyp přístupu ke zrojům mapy.cz na iPhone . Následující video předvádí mapy.cz na iPhone 3G s přístupem přes Wifi.  Tahle aplikace samozřejmě není a ani nebude dostupná na AppStore, jedná se pouze o experiment, který věřím, že Seznam výkonnostně překoná…nechme se překvapit…

Mapy.cz na iPhone- video

iPhone and HOLUX1200 GPS bluetooth with Navigon

P1010254I have bought recently Navigon for iPhone for Europe and tested this in various conditions in Czech Republic. Despite overall great ratings I was disappointed.  The GPS signal was weak and was occasionally lost. When I drive on a road that is parallel to another road than the GPS point was jumping from one to another road (curiously ! ). Even strange was behavior like driving 130km/h on highway and Navigon jumped my position to side road ! In short weak GPS hardware in iPhone, bad weather conditions, dense urban areas makes this navigation unusable, or only working on 50%. GPS first lock takes sometimes more than 10 minutes if driving fast.

Navigon software is fantastic, no question about this, but what smash the quality down is GPS hardware. Now there is a solution to improve GPS in your iPhone – Use external GPS. One solution comes from TomTom with their iPhone holder. Another one is to use your own external GPS Bluetooth module and some trick how to enable iPhone to communicate with it. Actually to enable GPS BT module to work with iPhone you will need to jailbreak your iPhone and use something like Roqy GPS  http://www.roqy-bluetooth.net/roqyGPS.html

I have bought Roqy GPS license (8 EUR), and Holux 1200 GPS (40 EUR), I have used my first iPhone (2G) with OS 3.0 Jailbreaked. You have to install MobileSubstrat via Cydia, install roqyGPS, do obscure and obtrusive license registration with 32 digits (you will get license after paying over the PayPal and waiting up to 48 hours),  turn off internal iPhone Bluetooth and switch on RoqyGPS Bluetooth stack and voila you can use this in many iPhone applications using GPS. Even Whatever map, can use it. Nice thing is that Roqy GPS behaves as ‘first-class  citizen’ on iPhone – thta is other applications on iPhone can use GPS information comming from third part devices.  It is completely transparent form userpoint of view. Nice is that iPhone 2G has no GPS support so with this RoqyGPS hack you can learn youl old appliance to the new features.

So all works fine untill you try to turn-off screen (with upper iPhone button) then in my case external GPS connection has been lost and i had to switch off RoqyBT stack and connect device again. Also  unfortunately  you can’t  use  too much  Wi-Fi with the RoqyGPS  , somehow it is blocked . After some tesitng with Navigon on my trip to Bratislava it also crashed once the application. So there is still lot of places for improvments of it, but considering this is verison 0.9 I think it works very well in cases where you have pre-downloaded maps (like in Navigon) and you do not need to often go away from the external GPS .  Also bad thing is that license for Roqy  GPS is only for one concrete iPhone hardware, you can’t move it to another iPhone (this is more restrictive than Apple Store !)

iPhone Aplication tested:

Navigon Europe:  Holux1200 works with Navigon perfectly, it is like night and day  in comparision to embedded GPS performance. When just showing map (without navigaiton where it predicts position)  it precisely shows  location of my car

OffMaps: I just get trouble downloading tiles over the Wi-fi.

Whatevermap: works fine, nice to see detailed cadastral maps precise position (HOLUX 1200 is about 3-5m precise)

Last note: the picture used above is from perspective – it looks like Holux is bigg, in reality it looks like little bit bigger flash drive…

In summary: having paid for Navigon 139 USD and experiencing poor GPS performance- it is worth to use this RoqyGPS and invest cca 50 USD for external BT GPS and RoqyGPS driver . Consider this as real reason to jailbreak your iPhone to get most of this device.  Works fine with Navigon although it is sometimes obtrusive to re-pair devices if you move away from GPS BT device or you turn-off screen.

Update: in this follow-up post here http://blog.sumbera.com/2009/11/12/comparing-iphone-gps/ you can find video of GPS performance for 3 iPhones (2G with Holux, 3G and 3GS)


iPhone and HOLUX1200 GPS bluetooth with Navigon

WhateverMap on Apple Store

WhateverMap Lite v1.0, developed by Jiri Kaminek  has been today accepted for distribution through Apple Store . You can download it here (iTunes and iPhone requiered):


WhateverMap is similar to Google Maps but you can use different branch-specific map sources. Those sources should be more interesting and valuable in non-navigation filed of map using. WhateverMap use Web Map Services (WMS). WMS standard specification was created by the Open Geospatial Consortium (OGC). WMS may provide any geospatial data. There are many WMS severs and most of them are available for free. You can find servers with ortophoto, cadastral, soil types, migration of white storks, … simply WHATEVER.
You can add any WMS server by typing an URL address or simply use built-in catalog. There are some servers with interesting data as NASA Earth satellite photos, Mars satellite photos and many others. There is a rich list of Czech WMS servers.
You can browse a map using zoom-in, zoom-out or move. For better orientation it is possible to use actual position provided by built-in GPS module. Each WMS should map only limited area so there is a boundary of each map. It is possible to display whole map with boundary too.
It is possible to consume many sources in this application. So there is an easy way to change a source while browsing the map. You can easily compare the same area in different map sources. For example you can find out any building and then you can choose soil type map to determine stability of building’s foundation.
For better control of map there is a movement history. Sometimes GPS get lost a signal and display non-precision region. In this case it is posible to use undo and get more precision area before you get lost a signal. There is another interesting way to use the history. You can move around an area in first map layer and then use the same movements in different layers. For example you can follow a road and then you can use map layer with water or soil pollution to find out effect of road to water or soil quality.

・ZOOM-IN – double tap
・ZOOM-OUT – triple tap
・MOVEMENT – swipe on map

– Consume any WMS server map data (ortofoto, cadastral, mars, … WHATEVER)
– Map browsing (move, zoom)
– Support history in map movements (UNDO, REDO)
– Display your current location
– Display map boundary
– Change background color
– Movement history(UNDO, REDO)
– favourite list of WMS

– searching by location name (city, roads, country, …) – geocoding
– caching
– saving for offline use
– better catalog
– landmarks

first release


Compatible with iPhone and iPod Touch
Requires iPhone OS 2.2.1 or later

What’s new



WhateverMap on Apple Store