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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...
Laser Scanner and Architectural Accuracy Text
Laser scanner accuracy test architectural survey cultural heritage
2015/11/13
In last years laser scanning have increased its application in different fields: from geological to architectural and archaeological survey, from real time monitoring to rapid prototyping. Respect to ...
First Experiences with the Deformation Analysis of a Large Dam Combining Laserscanning and High-Accuracy Surveying
Civil Engineering Laserscanning Surveying Deformation Analysis
2015/11/13
Monitoring the static and dynamic behaviour of large dams has always been a topic of great importance, due to the impact these structures have on the whole landscape where they are built. Many instrum...
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...
LASER SCANNING IN POMPEIAN CITY WALL A COMPARATIVE STUDY OF ACCURACY OF THE DRAWINGS FROM 1930S TO 40S
Laser Scanning Pompeii City wall A. Maiuri
2015/10/8
This paper aims to compare between the drawings in 1930s and 40s and the result of our laser scanning from 2005 to 2007 and
analyze the causes of their failures. In the 19th century, Mazois makes no...
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 ...
Estimation with Weak Instruments: Accuracy of Higher Order Bias and MSE Approximations
weak instruments higher order expansions
2015/9/22
In this paper we consider parameter estimation in a linear simultaneous equations model. It
is well known that two stage least squares (2SLS) estimators may perform poorly when the
instruments are w...
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...
ACCURACY OF DIGITAL FRAME CAMERAS
digital aerial cameras geometry model deformation stereo plotting
2015/9/17
Due to legal restrictions, the German hard coal mining company Deutsche Steinkohle AG (DSK) is obliged to conduct a monitoring on surface changes (subsidence) caused by mining activity (e.g. Topograph...
ASSESSMENT OF DSM ACCURACY OBTAINED BY HIGH RESOLUTION STEREO IMAGES
IKONOS Cartosat DSM accuracy assessment
2015/9/17
The high-resolution satellite systems are more and more commonly providing products obtained in a stereoscopic models. This type of stereoscopic images, usually obtained from a single orbit becomes wi...
STEREOSCOPIC ACCURACY
Accuracy Camera Comparison Pixel Precision Quality Statistics Stereoscopic
2015/9/17
In the generation of photogrammetric products with large terrain coverage (Orthophoto, DTMs) some crucial issues like the application of DG / ISO procedures, the management of high amounts of data or ...