Services

I offer the following services:


App development

  • Development of mobile applications for Android an iOS
  • Integration of any spatial data
  • Location based services

Processing of spatial data

  • Processing of any desired maps as well as aerial and satellite imagery
  • Preparation of spatial data
  • Web applications with customized maps
  • Generation of map overlays for apps

Berlin-Tempelhof

Projects

Recently realized projects:


Hamburg – Historical Atlas

  • A virtual promenade through seven centuries of Hamburg history
  • This app is based on maps of the "Atlas zur Geschichte Hamburgs" (Atlas to the history of Hamburg) from Ernst Heinrich Wichmann, published in the Herold'sche Buchhandlung, Hamburg in the year 1889.
  • The Atlas consists of six maps of which 3 are shown in the free version of the app (years 1830, 1650 and 1550). The app "Hamburg - Historical Atlas pro" contains all the maps of the atlas (additional maps of the years 1150, 1200 and 1250).

App erhältlich bei Google Play Standard version

App erhältlich bei Google Play Full version, ad-free

1A Unit Converter

  • A user friendly, intuitive, customizable and feature rich conversion tool with 37 categories of units:
  • Basic units: length, area, volume, mass
  • For everyday use: currencies, temperature, velocity, time, fuel consumption, angle, data, typography, shoe sizes, clothing sizes, wind
  • The scientific categories: pressure, force, energy, power, acceleration, torque, frequency, electric current, voltage, density, flow rate, viscosity, concentration, illuminance, luminance, sound pressure, magnetic flux, magnetic field strength, radiation, number systems and unit prefixes

App erhältlich bei Google Play Standard version

App erhältlich bei Google Play Add-free version

Calculator SR1

  • A photorealistic simulation of the "Schulrechner SR1", a pocket calculator made in the German Democratic Republic (East Germany).
  • The app comprises numerous of frequently used functionalities and obeys the "order of operations".
  • The keys give optical (key color), acoustic (key sounds) and haptic (vibration of the device) feedback.
  • Basic arithmetic operations; Root, square, percent and reciprocal functions; Trigonometric functions; Logarithm; Memory functions; Exponential representation

App erhältlich bei Google Play Standard version

App erhältlich bei Google Play Add-free version

Taschenrechner MR 610

  • A photo-realistic simulation of the "MR 610", the most powerful scientific pocket calculator made in GDR (German Democratic Republic)
  • The app comprises numerous functionalities:
    Basic arithmetic operations, square root, cubic root, square, percent and reciprocal functions, factorial, calculations in parentheses, trigonometric functions, logarithmic functions, statistical calculations, conversion to polar and to cartesian co-ordinates, conversion to decimal degrees and to degrees, minutes and seconds

App erhältlich bei Google Play Standard version

App erhältlich bei Google Play Add-free version

Elwro 441 "Bolek"

  • A photorealistic simulation of the Polish pocket calculator Elwro 441 "Bolek".
  • The app comprises frequently used functionalities and obeys the order of operations (unlike the original pocket calculator).
  • The keys give optical (key color), acoustic (key sounds) and haptic (vibration of the device) feedback. Furthermore, the back of the original calculator can be displayed.
  • Features: The 4 basic arithmetic operations: Addition, subtraction, multiplication and division (the order of operations is observed!); Root, square, percent and reciprocal functions; Memory functions
  • The Elwro 441 "Bolek" was a pocket calculator with an LED display which was manufactured by "Wrocławskie Zakłady Elektroniczne Mera-Elwro" in Wrocław/Poland (about 1978/79).

App erhältlich bei Google Play Standard version

App erhältlich bei Google Play Add-free version

Frankfurt map app

  • Follow a plot accurate map of Frankfurt of the year 1862.
  • The app is based on the map "Geometrischer Plan von Frankfurt am Main" (Geometric map of Frankfurt am Main) from August Ravenstein, published by the Verlag des geographischen Instituts at Frankfurt am Main in the year 1862.
  • The detailed map is one of the first maps drawn to scale of Frankfurt.

App erhältlich bei Google Play Standard version

App erhältlich bei Google Play Add-free version

Historical Atlas of Berlin

  • This unique app takes you on a virtual walk through Berlin on the maps of a historical atlas!
  • The six maps of the "Historischer Atlases von Berlin, in VI Grundrissen nach gleichem Maasstabe; von 1415 bis 1800." (Historical Atlas of Berlin, in VI ground plots at the same scale; 1415 to 1800.) by Johann Friedrich Marius Schmidt, 1835 can be compared directly with the current situation (OpenStreetMap).
  • The historical maps can used be offline, i.e. without an Internet connection.

App erhältlich bei Google Play Standard version

App erhältlich bei Google Play Add-free version

Berlin – Boroughs & Localities

  • Berlin consists of 96 localities belonging to 12 boroughs. The names of the 23 boroughs that existed until the administrative reform in 2001 are still used colloquially.
  • The app determines the borough of Berlin and the respective locality where you are. Furthermore, the particular borough before the administrative reform of 2001 is displayed.
  • Additionally the respective location of the user is shown on the map of the Berlin boroughs and localities.

Download on Google Play

Berlin – Divided City

  • This app shows the course of the Berlin Wall and the former sectors on a historical map of the CIA.
  • If you are inside Berlin the app determines in which of the former sectors you are situated.
  • The map shows the border line after the last exchange of territory between East Germany and West Berlin on 1 July 1988 and the day of reunification on 3 October 1990. The historical map is superimposed with a colored overlay of the four sectors.

App erhältlich bei Google Play

About me


Alexander Vollmar
 

ich selbst
Geography (Diploma)

Specialization in remote sensing techniques
and Geographic Information Systems (GIS)

Computer Science of Media (M.Sc.)

Mobile app development
Augmented reality
Web applications (Ruby on Rails)

Contact


Write to me:

Imprint

Alexander Vollmar
Oderstraße 29
12049 Berlin

E-Mail: contact@vollmar.berlin
Tel.: +49 151 10729500




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