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Hazard exploration

  • Categories:Application
  • Time of issue:2020-08-30 00:00:00
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Hazard exploration

Sun Hawk(Henan) Aviation Industry Co.,Ltd. is mainly engaged in UAV aerial photography and aerial survey and the sale of UAVs. The company has 4 professional aerial photography teams, and the flight controllers have more than 3 years of flight experience.

powerful complement to traditional aerial photogrammetry, with high flexibility, efficiency and fast speed, fineness and accuracy, low operating cost, wide application range and short production cycle.

Aerial survey is also known as photogrammetry and remote sensing. UAV aerial survey is currently used for terrain survey, land supervision and management, urban and rural planning, disaster investigation, land right confirmation, power line walking, cartography.

Aerial survey is the remote sensing science which is a part of surveying and mapping science, with the applications of space science, electronic science, earth science, computer science and other sciences, where non-contact sensors are used to obtain the spatio-temporal information about the target. It can not only provide solutions for the geometric positioning of traditional targets; more importantly, it can make use of outer space sensors to obtain images and non-image information for semantic and non-semantic interpretation, so as to extract the information on the geometry and physical characteristics of target objects in the objective world, providing us with more scientific techniques and methods for understanding and transforming nature. It is mainly used in surveying and mapping, urban construction planning, traffic planning, pipeline planning, land planning, agriculture, forestry, water conservancy, meteorology, resource environment, disaster prevention and mitigation. The advanced UAVs adopted by the company are featured by superior performances, accurate image acquisition, large operating areas, high efficiency and flexibility, which can meet the CH/Z3003-2010 1: 500, 1: 1000, 1: 2000 large scale mapping accuracy requirements of the "specifications for office operation of low-altitude digital aerophotogrammetry" and the GB 7930-1987 and GB/T7930-2008 in the 1: 1000 and 1: 2000 large scale mapping accuracy requirements of the traditional aerial survey specifications.

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CASE

Overview of Project's Survey Area:

Lvcun Town is located in at the junction of Henan and Hebei. The provincial artery - Anchu Highway runs from west to east across the center of the town. It is only 28 kilometers from Anyang in the west, enjoying a strategic location, and convenient transportation. The town has a total area of 67.5 square kilometers, a population of 69095 people, of which 67798 is agricultural population. It has an arable land of 59,800 mu and 40 administrative villages, which is a typical town with large population and large scaled agriculture. The new town planned has an area of 6.25 square kilometers, adjacent to the North Ring Road in the north, and Qiwu Road in the west, 0.5 kilometers from Anchu Road in the south, and 0.5 kilometers from the Changshan Road in the north. The new town has a population of 290,000 people (survey area).

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Flight program design:

  The project has a measuring area of about 300km², whose terrain is mainly plains, with an average elevation of about 60m (highest of about 65m, and lowest of about 55m). According to the operational requirements of Party A, the flight program design for the project consists of a ground resolution of 20cm, a relative flight height of 740m, longitudinal overlap of 70%, lateral overlap of 50%, and a total of 2 sorties. The mission adopts a large-scale flight overlap program, for the purpose of improving the accuracy of the disaster area in the subsequent process. The average flight height of the survey area is about 740m. Based on the highest and the lowest elevations in the survey area, the GSD of the image obtained is 15cm ~ 18cm, meeting the need of Party A’s project.

Technical Standards Implemented:

  (1) GB/T18314 ~ 2009 "Specifications for global positioning system (GPS) survey”

  (2) CJJ73-97 "Technical specifications for urban surveying using global positioning system (GPS)”

  (3) CJJ8-99 "Code for urban survey”

  (4) GB/T20257.1-2007 "Specifications for cartographic symbols 1: 500, 1: 1000, 1: 2000 topographic maps” ("topographic maps")

  (5) GB/T18316-2008 "Specifications for inspection and acceptance of quality of digital surveying and mapping achievement"

"Hawkeye"mission module is designed to be able to carry standard cameras, tilted cameras and so on:

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"Hawkeye"UAV Specifications:

Body size: 2250*650*3500mm Cruising speed: 120km/h
Body size: 21kg Stalling speed: 18m/s
Maximum takeoff weight: 32kg Engine power: 7 hp / 12 hp (optional)
Maximum speed: 160km/h Taking off and landing mode: Vertical takeoff and landing
Control radius: 30km Endurance: 3-4h
Flying height: 100-4500m    

Camera parameters:

  Sun Hawk "Hawkeye"industrial UAVs are used for aerial photography. The specific camera parameters are as follows:

Aerial photography time 2016.07.5
Aerial photography camera Canon5DS
Pixel size 4.1µm
Lens focal length 35mm
Relative flight height 740m
Ground resolution 0.2m
Shutter speed 1/1000s
Aperture size 2.8~4
ISO 500
Flight mileage 400km²
Flight time 240min
Photographing 2514Sheet

Route planning:

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Skyeye drone field operations:

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"Hawkeye"UAV data check:

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"Hawkeye"UAV data sheet preview:

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3D camera calibration

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Office operation work flow:

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High-precision post-production data aerial triangulation:

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Aerial aerial preview:

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Aerial aerial preview(Part):

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Data disaster analysis

The area of affected area was extracted by professional data analysis software, and the vegetation and non - vegetation areas were distinguished by the ratio of green band and Hue after HSI. Analysis of the disaster area accuracy of up to 95% or more (data analysis structure).

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Data disaster analysis(Part)

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Data disaster analysis(Part)

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