搜索结果: 31-45 共查到“测绘科学技术 Height”相关记录71条 . 查询时间(0.059 秒)
HIERARCHICAL WATERSHED SEGMENTATION OF CANOPY HEIGHT MODEL FOR MULTI-SCALE FOREST INVENTORY
LiDAR CHM Watershed segmentation Scale Crown delineation Forest inventory
2015/11/10
Canopy Height Model (CHM) is a standard LiDAR-derived product for deriving relevant forest inventory information, among which individual tree identification is a crucial task. The watershed algorithm ...
SINGLE-TREE FOREST INVENTORY USING LIDAR AND AERIAL IMAGES FOR 3D TREETOP POSITIONING,SPECIES RECOGNITION,HEIGHT AND CROWN WIDTH ESTIMATION
Allometry Modeling Mapping Sampling Photo-plot Calibration Multi-Scale Matching Template
2015/11/10
An entire single-tree remote sensing (STRS) system was developed and tested in an inventory of timber resources of a 56.8-hectare forest. A semi-automatic approach with operator intervention is used i...
TREE HEIGHT ESTIMATION METHODS FOR TERRESTRIAL LASER SCANNING IN A FOREST RESERVE
Terrestrial Laser scanning Forestry Photogrammetry Modelling Single tree
2015/11/10
A terrestrial laser scanning survey has been performed on a forest reserve site. This paper represents the processing of the dataset. Two new methods have been developed for tree positioning, which is...
ESTIMATION OF THE LIDAR HEIGHT OFFSET IN COASTAL VEGETATED AREAS
lidar laser scanning vegetation accuracy feature extraction intensity values
2015/11/10
Authorities operating in the field of coastal management require reliable area-wide height information for their responsibilities regarding to the safety of the coastal area. In this context the lidar...
ASSESSMENT OF HEIGHT ACCURACY OF DEM FOR SPECIES HABITAT ANALYSIS AND MODELLING
DEM accuracy spatial correlation of error slope Swiss National Park GIS
2015/9/28
In mountainous areas, the use of DEM as environmental parameter in local and global models is widely accepted. Derived information like slope, aspect and others are often used as substitutes for missi...
HEIGHT ACCURACY BASED ON DIFFERENT RTK GPS METHOD FOR ULTRALIGHT AIRCRAFT IMAGES
Aerial images positioning image processing accuracy
2015/9/21
Height accuracy is one of the important elements in surveying work especially for control point’s establishment which requires an accurate measurement. There are many methods can be used to acquire he...
HIGH RESOLUTION SRTM HEIGHT MODELS
SRTM DEM DSM validation
2015/9/17
For the area of the United States the Shuttle Radar Topography Mission (SRTM) height models are available with 1 arcsec spacing instead of the 3 arcsec spacing outside the country. Only special users ...
By the Shuttle Radar Topography Mission (SRTM) a nearly world wide height model has been generated, which is available free of charge. The mayor limitation of this height model is the point spacing of...
HEIGHT GRADIENT APPROACH FOR OCCLUSION DETECTION IN UAV IMAGERY
UAV DSM TIN Double Mapping Height Gradient Occlusion Detection True Orthophoto
2015/9/10
The use of Unmanned Aerial Vehicle (UAV) significantly increased in the last years. It is used for several different applications, such as mapping, publicity, security, natural disasters assistance, e...
Our previous studies using airborne lidar data have shown that the tree height indices derived from the GLAS and
LVIS waveforms were highly correlated. The quartile waveform energy heights derived fr...
An optical triangulation method for height measurements on non-stationary water surfaces
Triangulation Water Surfaces Laser Light Sheet
2015/8/24
Optical triangulation methods based on a laser light sheet and digital camera are used as a surface measurement technique in a wide range of applications. They allow a fast and accurate determination ...
REGION REFINEMENT AND PARAMETRIC RECONSTRUCTION OF BUILDING ROOFS BY INTEGRATION OF IMAGE AND HEIGHT DATA
Building reconstruction Feature extraction Segmentation LiDAR Data fusion Photogrammetry
2015/8/7
The refinement of the features extracted from image data is a key issue in automated building extraction since feature extraction algorithms often result in incomplete features. This paper describes a...
Improvement of Forest Height Retrieval By Integration of Dual-Baseline PolInSAR Data And External DEM Data
Forest height retrieval Polarimetric synthetic aperture radar interferometry (PolInSAR) Sloped-Random volume over ground(S- RVoG) Dual-baseline
2015/7/27
In recent years, a lot of studies have shown that polarimetric synthetic aperture radar interferometry (PolInSAR) is a powerful technique for forest height mapping and monitoring. However, few researc...
Low-height Aerial Imagery and Digital Photogrammetrical processing for Archaeological Mapping
Photogrammetry Archaeology Cultural Heritage
2015/7/15
In the framework of the Joint Archaeological Mission of the Universities of Bologna and Lecce at the ancient town of Soknopaiou
Nesos (Fayyum, Egypt) a wide-range of geomatic methodologies were exper...
A HEIGHT ANDTEXTURE INFORMATION INTERGRATED APPROCH FOR OBJECT EXTRACTION APPLIED TO AUTOMATIC AERIAL TRIANGULATION
Photogrammetry Segmentation Algorithms
2015/6/1
This paper proposes a method of objects extraction based high and color texture features. Trees or forests are interested objects in
this paper, which are higher than their surroundings. According t...