- Remote sensing is a technique that remotely observes and gathers information. The sensor is launched by a platform to a beneficial observing place. We are born with vision and hearing, and each sensor extends our abilities to explore the environment. The information sensed by remote sensors may be an electromagnetic wave, a sound wave or a gravitational wave. Electromagnetic wave is the primary information. The observation extents of high buildings or mountains were limited. Along with the inventions of balloons, aircrafts and satellites, however, the sensors can be brought to a suitable observation site.
- Remote Sensing indicates Aerial photos and Satellite Images
- Common remote sensing imagery: Various remote sensing images are produced by different platforms and sensors according to the purpose of investigation.
Ortho-image(Procedure of aerial photos with ortho-recification)
The scales of photos are similar while taking a photo perpendicularly to the ground at the same location. After rectifying these photos, they can be used to produce maps. This procedure will save time and money for the ground investigation and survey. To mosaic a series of equivalent scale ortho-images that covers an area will show the whole aspect view of this area. Taiwan’s 1/25000 photo fundamental maps are manufactured by ortho-photos.
Tilt image
A sidelooking airphoto is taken from the windows in a plane. People can easily interpret and recognize the topography from the photos without any training.
- Applications of Remote Sensing
1.land use 2.disasters 9.topologic maps:small scale(remote sensing)、large scale(aerial photos)
3.resource survey 4.object detection
5.change detection 6.GIS application
7.DTM extraction 8.environment evaluation
- Development trends of the Remote Sensing image processing
1.Intergration and appication of multi-images
2.GIS、RS、GPS integration
3.Multi-temoporal and hyper-spectrum sub pixel detection
4.Artificial Intelligence Remote Sensing image processing
