The frequently asked questions below will help you to understand the concepts relating to VentusAR and the common queries we are asked. If there is anything else you think should be here or have a specific query please contact us for more information.


Questions

What is the resolution of the camera?

Our VentusAR devices contain 5 or 8 mega-pixel cameras (depending on device) at approximately a 4:3 aspect ratio. The iPad screen is 2048 x 1536 resolution so the camera is capturing more detail than is displayed in the live views.  VentusAR views can also be captured and used at a later date, retaining the high-definition image.


How does the screen resolution affect image output?

For VentusAR dynamic visualisation, the screen resolution on modern tablets is at a high enough pixel density that the human eye is unable to notice pixilation at a typical viewing distance. iPad devices have a Pixels-per-Degree (PPD) of greater than 50. VentusAR is a supporting tool for visual assessment and as such the screen resolution and image is not subject to the same criteria as published or printed materials.  Output from VentusAR is designed to be viewed on screen or in PDF renders – higher quality, large-format output is under development. Further reading: http://en.wikipedia.org/wiki/Retina_Display


What is the GPS accuracy of the position?

Different mobile tablets have different GPS (or satellite positioning chipsets including other systems such as GLONASS) hardware capabilities and therefore different levels of processing precision. Sub-10m accuracy is common and at a 1000m viewing distance this related to 0.5 degrees of arc. VentusAR digital fidelity always reports the confidence of a location and allows for third-party (high precision) receiver position integration or mapping location to be used and override internal tablet calculated locations.


What are sensors?

Sensors are small hardware components embedded in mobile phones and tablets (and many other devices) that convert measurement or observation to interfaces that may be accessed by the operating system and software. VentusAR utilises sensors to determine the position and orientation and attitude of the device through a combination of magnetometer (compass), accelerometer (gravity) and gyroscope (stability).


How does the system work when there is no WiFi or mobile data signal?

VentusAR has been designed with remote field working in mind and can cache the required terrain models, 3D data and overlays in advance, so removing the need for any wireless or mobile data connection when on site.


Can I upload my own 3D models?

Yes. VentusAR has three different levels of service levels and the upload and utilisation of 3D models for different turbines, substations, radio masts and other site features is supported within the model. Our process is designed to support and assist you in delivering the data suitable to incorporation in VentusAR visualisation.


What data is included?

All versions of VentusAR are supplied with access to national GB coverage of Ordnance Survey large-scale VectorMap District mapping and Terrain 50 DTM for terrain data. These datasets allow any location in Britain to be assessed for site development and viewpoint visualisation. Higher resolution data and DTM may be licenced and incorporated on a per-site basis.


How can I supply my own map overlays?

Geo-referenced image overlays containing data such as ZTV maps, aerial photography or other map data can be integrated into the VentusAR views for context and communication.


What is the license model?

Licensing is based on a flexible approach dependent on usage and content. See the pricing page for more details.


How many users can I have?

VentusAR is licensed by devices and projects rather than users in order to provide a high level of app accessibility. A device can be shared between unlimited users or additional devices may be purchased and deployed.


What if I break my VentusAR tablet?

Accidents happen and we understand the issues of using devices in the field. VentusAR is supplied as licence to use and so is not tied to the original hardware. If your tablet is lost or unusable we can reinstall the application onto a new device – we recommend that you take out appropriate insurance cover.


Can I import existing GIS or data files with locations?

Yes you can. The VentusAR web interface for administrators allows common text (CSV) files to be uploaded with points for turbine or viewpoint locations making setting-up projects simple, easy and quick – and eliminating data entry errors. These can be easily exported from GIS systems.