搜索结果: 1-12 共查到“测绘科学技术 Z-order”相关记录12条 . 查询时间(0.156 秒)
HIERARCHICAL HIGHER ORDER CRF FOR THE CLASSIFICATION OF AIRBORNE LIDAR POINT CLOUDS IN URBAN AREAS
Classification Point Cloud Higher Order Random Fields Contextual Lidar Urban
2016/7/28
We propose a novel hierarchical approach for the classification of airborne 3D lidar points. Spatial and semantic context is incorporated via a two-layer Conditional Random Field (CRF). The first laye...
PARALLEL PROCESSING OF BIG POINT CLOUDS USING Z-ORDER-BASED PARTITIONING
Z-order Spatial partitioning Big Data
2016/7/8
As laser scanning technology improves and costs are coming down, the amount of point cloud data being generated can be prohibitively difficult and expensive to process on a single machine. This data e...
K-ORDER-BASED TOPOLOGICAL RELATIONS OF GEO-ENTITIES IN 3D RASTER SPACE
GIS Model Spatial Raster Three-dimensional Algorithms
2015/12/23
The theoretical foundations and application availability of topological spatial relationship research for three dimensional Geo-entities in raster space are discussed. The digital topology theory is a...
ACCURACY OF CROWN SEGMENTATION AND ESTIMATION OF SELECTED TREES AND FOREST STAND PARAMETERS IN ORDER TO RESOLUTION OF USED DSM AND NDSM MODELS GENERATED FROM DENSE SMALL FOOTPRINT LIDAR DATA
Airborne Scanner System Segmentation Aerial photogrammetry Comparative analysis Forestry
2015/12/23
The purpose of this study is to categorize how different surface model resolutions impact the estimation of trees and forest stands parameters: number of recognized trees, crown area, treetop location...
PROPOSING A MULTI-CRITERIA PATH OPTIMIZATION METHOD IN ORDER TO PROVIDE A UBIQUITOUS PEDESTRIAN WAYFINDING SERVICE
Multi-Criteria Pedestrian Wayfinding Ubiquitous Service Context-Aware
2016/1/18
A myriad of novel applications have emerged nowadays for different types of navigation systems. One of their most frequent applications is Wayfinding. Since there are significant differences between t...
Approximating LIDAR Ground Elevation Data by Higher-Order Tensor-Product B-Splines
DEM/DTM LIDAR Surface Modelling Reconstruction GIS
2015/12/8
We consider, in this paper, the problem of reconstructing the surface from LIDAR ground elevations. We reconstruct the surface by first rotating the LIDAR scan-lines so that they are parallel to the Y...
Extraction of Main and Secondary Roads in VHR Images Using A Higher-Order Phase Field Model
Road Urban Satellite Segmentation Modelling Variational methods
2015/12/4
This paper addresses the issue of extracting main and secondary road networks in dense urban areas from very high resolution (VHR, ~0.61m) satellite images. The difficulty with secondary roads lies in...
Higher Order Properties of Bootstrap and Jackknife Bias Corrected Maximum Likelihood Estimators
Bootstrap and Jackknife Bias Likelihood Estimators
2015/9/22
Pfanzagl and Wefelmeyer (1978) show that bias corrected ML estimators are higher order efficient.
Their procedure however is computationally complicated because it requires integrating complicat...
Difference in Difference Meets Generalized Least Squares: Higher Order Properties of Hypotheses Tests
panel data treatment eff ect GLS
2015/9/22
We investigate estimation and inference in difference in difference econometric models
used in the analysis of treatment effects. When the innovations in such models display serial
...
Satellite Imagery Elaboration (aster Sensor, Terra Satellite), in order to Map Rock Distribution in Extreme Areas. The Prince Albert Mountain Chain (victoria Land - Antartica).
Geology Identification Global Environmental Databases Satellite
2015/7/9
The present paper is a first attempt to use Remote Sensing and GIS methodologies in order to draw a rock distribution map in
a extreme land as Antarctica.
To this aim we elaborated an ASTER sensor i...
Retrieving structured information from an initial random collection of objects may be carried out by understanding the spatial
arrangement between them, assuming no prior knowledge about those object...
K-ORDER SPATIAL NEIGHBOURS BASED ON VORONOI DIAGRAM: DESCRIPTION, COMPUTATION AND APPLICATIONS
K-ORDER SPATIAL NEIGHBOURS VORONOI DIAGRAM: DESCRIPTION COMPUTATION APPLICATIONS
2015/3/13
K-ORDER SPATIAL NEIGHBOURS BASED ON VORONOI DIAGRAM: DESCRIPTION, COMPUTATION AND APPLICATIONS.