FAQ

How much will it cost?

The cost of your specific aerial survey solution is dependent on the size of the site and your specific requirements. Contact Survey Graphics for a FREE quote to find out about exact costing.

How accurate is aerial mapping?

Aerial Surveys can be as accurate as you need. Simply discuss your needs with the friendly Survey Graphics team.

Why do you have to have survey control?

Survey Graphics work in the real world and supplies all data in real world coordinates. Aerial survey control is derived from land surveyed control or airborne DGPS (differential geographic positioning systems), or a combination of both.

What services do Survey Graphics offer?

Survey Graphics provide many professional services including:
  • 3D Surface Mapping
  • Aerial Photography
  • Aerial Mapping
  • Aerial Photo Maps
  • Aerial Surveys
  • Contour Mapping
  • Digital Imagery
  • Digital Mapping
  • Digital Terrain Models
  • Digital Elevation Models
  • Geological Mapping
  • Geospatial Analysis
  • GIS/CAD Services
  • Hardware, Software and Scanning Support Products
  • Land Mapping
  • Lidar
  • Photogrammetry
  • Remote Sensing
  • Resource and Terrestrial Mapping
  • Topographic Mapping
  • Volumetric Surveys

From a building site to an entire country, there’s nothing Survey Graphics can’t map. For more information, please don’t hesitate to contact Survey Graphics.

Do you provide a Free Quote?

Please give consideration to the solution you are requiring and contact Survey Graphics for a FREE no obligation quote and a cost effective solution.

When will my aerial survey be completed?

Survey Graphics endeavour to provide approximate time estimates for which the project may take, working with clients for the best outcome. All aerial surveys are weather dependent.

How low do you fly?

The flying height of aerial surveys depends on the accuracy required by the client.

What is photogrammetry?

Photogrammetry can be most simply described as the process of gathering geometric and spatial data about objects and landscapes from photographs. As a practise, photogrammetry has existed almost as long as photography. Advances in digital mapping technology have increased the accuracy of photogrammetric calculations to near perfection.

How do you obtain aerial images?

Survey Graphics’ aerial photographs and images are obtained from a number of sources, including satellites in the Earth's orbit (IKONOS and Quick-Bird, for instance) and specialised surveillance aircraft.

Which software do you use for digital imaging?

Survey Graphics use a suite of exclusive photogrammetric software. Survey Graphics is the exclusive agent for the GeoSystem DPS softcopy suite of products in Australia, Indonesia and the Pacific Region.

What is an Orthophoto?

An orthophoto is an aerial photograph planimetrically corrected. Orthophotographs have the positive attributes of a photograph such as detail and timely coverage, and the positive attributes of a map, including uniform scale and true geometry. This enables orthophotographs to be used in their primary role as a backdrop on which map features can be overlaid. Orthophotos are now created by scanning aerial photographs and converting them into a Raster image file format. A digital terrain model is added as a means of collecting ground points to indicate the changes in elevation. When control points are identified on the aerial photos, stereo models are developed and geometric distortions are estimated. The image is rectified and geo-referenced using mathematical models of photogrammetry to remove tilt, terrain, atmospheric and other digital image distortions.

What is a DTM?

DTM stands for digital terrain model, a method of transforming elevation data into a contoured surface or a three-dimensional display.

What is a DEM?

DEM stands for Digital Elevation Model, also referred to as a DTM or digital terrain model and it is a GIS Raster layer representing elevation.