Data Acquisition
Data Acquisition is a process of acquiring, extracting, transforming, and transporting data from the source systems and external data sources to the data warehouse database objects. ATPL specializes in Data Acquisition using following three methods:
- Aerial Photography using LiDAR Technology-
Photography of a part of the earth's surface taken by an aircraft-supported camera using LiDAR Technology. LiDAR (Light Detection and Ranging) is an optical remote sensing technology that measures properties of scattered light to find range, height and/or other information of a distant target.
- High Resolution Satellite Imagery- Remote sensing images captured through satellites are recorded in digital forms and then processed by the computers to produce images for interpretation purposes.
- Ground Survey- The technique and science of accurately determining the terrestrial or three-dimensional space position of points and the distances and angles between them. These points are usually on the surface of the Earth, and are often used to establish land maps and boundaries for ownership or governmental purposes.
It is difficult to collect data over every square meter of the Earth's surface. Therefore, samples are taken at discrete locations. For a more specific approach ATPL uses a Hybrid solution which encompasses one or more of the above methods depending upon the requirements of the client.
In nutshell, ATPL’s Data acquisition involves the following:
- Planning for High Spatial Resolution Data Acquisition using Airborne & Digital Cameras
- Planning for Aerial survey
- Setting of ground control
- Optimizing number of flight paths
- Monitoring high GSD (Ground Sample Distance) and plannimetric height accuracy