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Digital Cameras for a Photogrammetric Production Environment: a Test of the Geometric Stability and Accuracy
Photogrammetry Mapping Digital Camera Geometry Accuracy
2015/11/23
The use of digital cameras in the photogrammetric work flow has gained widespread acceptance over the past few years. Whereas the geometric specifications of analogue aerial cameras have been thorough...
Geometric Accuracy Assessment of ADS40 Imagery under Various Network Configurations
Photogrammetry Three-line Pushbroom Camera Triangulation Calibration Accuracy
2015/11/23
The ADS40 camera is a commercial example of the airborne Three-Line-Scanner (TLS). Its particular sensor geometry requires new approaches and a specialization of methods and algorithms to solve the tr...
Theoretical Accuracy of Direct Georeferencing with Position and Orientation System in Aerial Photogrammetry
Aerial Photogrammetry GPS/INS Orientation Accuracy Error Algorithms
2015/11/23
According to the principle of space intersection、collinearity equations and error propagation law, mathematical models of theoretical accuracy of direct georeferencing are proposed in this paper. The ...
Application and Accuracy Evaluation of Leica ADS40 for Large Scale Mapping
ADS40 push-broom digital sensor mapping local coordinate accuracy
2015/11/23
Leica ADS40 photogrammetry system is one of the advanced aerial survey and mapping systems. Based on the three linear CCD arrays and pushbroom technology, ADS40 enables the quick acquisition of high s...
Accuracy Analysis of Large Size Digital Aerial Cameras
Photogrammetry Digital Geometry Calibration Block Accuracy
2015/11/20
A test area north of Philadelphia was flown with Vexcel Imaging UltraCamD, UltraCamX and Z/I Imaging DMC digital frame cameras as well as with the 3D-CCD-line scanner camera Leica ADS40 and the analog...
On Improvement of Accuracy of Airborne Laser Scanner Data Using Digital Images
LIDAR Integration Aerial Photogrammetry GPS/INS Bundle Adjustment Georeferencing
2015/11/20
Airborne laser scanner is useful system for acquiring point clouds 3D data with real-time, and it came to be generally used in the late 1990s. Airborne laser scanner have effectiveness in extracting m...
Analyzing on Pixel Positioning Accuracy of SAR Images Based On R-D Location Model
SAR Image Targets Pixel Error Analysis
2015/11/20
The range-Doppler (R-D) model, which requires no reference points and is independent of satellite attitude knowledge and control, is used to determine the location of SAR images. However, its error ha...
Increasing-Geometric Accuracy of DMC's Virtual Images
Digital Aerial Cameras Camera Calibration Bundle Adjustment Self-calibration
2015/11/20
In the last two to three years, there have been a number of investigations into the geometric accuracy of large format digital cameras, particularly for large scale and engineering application. Geomet...
3D Height Accuracy Survey and Modelling of one of Aosta's Anthropomorphic Stelae
Cultural Heritage Archaeology Archiving Recording Close Range High resolution Increased Reality
2015/11/12
The Aosta Valley still preserves important traces of prehistoric and protohistoric settlements in the aeneolithic necropolises of Champrotard (Villeneuve), Montjovet and Vollein (Quart), partly associ...
ACCURACY OF FOREST PARAMETERS DERIVED FROM MEDIUM FOOTPRINT LIDAR UNDER OPERATIONAL CONSTRAINTS
LiDAR canopy height model (CHM) canopy closure degree of composition National Forest Inventory (NFI)
2015/11/10
The objective of this study is to test the feasibility of nation-wide medium footprint airborne laser scanning (ALS) data forderivation of forest parameters. The comparison of canopy closure as one im...
Spatial Data Positional Accuracy Analyzing and Testing
DLG GPS Quality Control Accuracy Testing Error Distribution
2015/10/12
In this article 1:50000 DLG data is used as an example to analyze and test spatial data positional accuracy.At first 1:50000 DLG data
acquisition technical process and data content is simply introdu...
OPTIMIZED IMAGE SEGMENTATION AND ITS EFFECT ON CLASSIFICATION ACCURACY
Image segmentation Segment based classification Variance Spatial autocorrelation Moran’s Index SPRING McNemar’s test
2015/9/28
Image segmentation is a preliminary and critical step in segment-based image analysis. Its proper evaluation ensures that the best segmentation result is used in image classification. In this paper, i...
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...
INCREASING ACCURACY IN ANALYSIS NDVI-PRECIPITATION RELATIONSHIP THROUGH SCALING DOWN FROM REGIONAL TO LOCAL MODEL
NDVI-Rainfall Relationship GWR Modelling Uncertainty reducing Kazakhstan
2015/9/28
Spatial relationship between vegetation and rainfall in Central Kazakhstan has been modelled using Normalized Difference Vegetation Index (NDVI) and rainfall data from weather stations. The modelling ...
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...