scholarly journals The Use of GIS and Google Earth Images for Mapping of Taraba State University Campus

2018 ◽  
pp. 1-16
Author(s):  
Hajara A. Garba ◽  
Vincent N. Ojeh ◽  
Elizabeth Elijah ◽  
Bishop E. Ayeni
Keyword(s):  
Google Earth ◽  
Control Points ◽  
State University ◽  
University Campus ◽  
Geospatial Techniques ◽  
The North ◽  
Ground Control Points ◽  
Data Source ◽  
North Western ◽  
Geo Database

A Campus guide map for Taraba State University Jalingo was produced. The data source for the study includes satellite images of the study area and field survey using a GPS device to collect coordinates of major ground control points. This research incorporated the use of geospatial techniques and functionalities such as georeferencing, digitizing and geo-database creation to generate a campus guide map. The findings of this study reviewed that most of the structures and roads are not adequately labeled or named for easy navigation. The study also showed that development is confined mostly to the North Western and southwestern part of the campus.           We recommend structural planning and spatial development within the campus land cover in the future.  

scholarly journals Correction of Very High-Resolution Satellite Images using Control Points Captured by Web Map Service (WMS) server: Google Earth

2020 ◽  
Vol 9 (8) ◽  
pp. 188-194
Keyword(s):  
Large Scale ◽  
Satellite Images ◽  
Google Earth ◽  
Ground Control ◽  
Control Points ◽  
Web Map ◽  
Ground Control Points ◽  
High Resolution Satellite Images ◽  
Map Scale ◽  
Map Service

The recent progress for spatial resolution of remote sensing imagery led to generate many types of Very HighResolution (VHR) satellite images, consequently, general speaking, it is possible to prepare accurate base map larger than 1:10,000 scale. One of these VHR satellite image is WorldView-3 sensor that launched in August 2014. The resolution of 0.31m makes WorldView-3 the highest resolution commercial satellite in the world. In the current research, a pan-sharpen image from that type, covering an area at Giza Governorate in Egypt, used to determine the suitable large-scale map that could be produced from that image. To reach this objective, two different sources for acquiring Ground Control Points (GCPs). Firstly, very accurate field measurements using GPS and secondly, Web Map Service (WMS) server (in the current research is Google Earth) which is considered a good alternative when GCPs are not available, are used. Accordingly, three scenarios are tested, using the same set of both 16 Ground Control Points (GCPs) as well as 14 Check Points (CHKs), used for evaluation the accuracy of geometric correction of that type of images. First approach using both GCPs and CHKs coordinates acquired by GPS. Second approach using GCPs coordinates acquired by Google Earth and CHKs acquired by GPS. Third approach using GCPs and CHKs coordinates by Google Earth. Results showed that, first approach gives Root Mean Square Error (RMSE) planimeteric discrepancy for GCPs of 0.45m and RMSE planimeteric discrepancy for CHKs of 0.69m. Second approach gives RMSE for GCPs of 1.10m and RMSE for CHKs of 1.75m. Third approach gives RMSE for GCPs of 1.10m and RMSE for CHKs of 1.40m. Taking map accuracy specification of 0.5mm of map scale, the worst values for CHKs points (1.75m&1,4m) resulted from using Google Earth as a source, gives the possibility of producing 1:5000 large-scale map compared with the best value of (0.69m) (map scale 1:2500). This means, for the given parameters of the current research, large scale maps could be produced using Google Earth, in case of GCPs are not available accurately from the field surveying, which is very useful for many users.

scholarly journals Kalmyk causative constructions: case marking, syntactic relations and the speaker’s perspective

2013 ◽  
Vol 2013 (94) ◽  
Author(s):  
Sergey Say
Keyword(s):  
State University ◽  
Causative Constructions ◽  
The North ◽  
Essential Properties ◽  
The Republic ◽  
Syntactic Relations ◽  
Syntactic Properties ◽  
Academy Of Sciences ◽  
North Western ◽  
Direct Correspondence

This study is primarily concerned with the syntactic organisation of Kalmyk clauses headed by verbs that contain a morphological causative marker. The data reported here have been compiled during the summers between 2006 and 2008 in the Republic of Kalmykia. The fieldwork was organised by St. Petersburg State University and the Institute for Linguistic Studies, Russian Academy of Sciences. This fieldwork has been conducted in several villages in the North-Western part of the Republic of Kalmykia. This region is supposed to be the area where the Dörböt dialect of the Kalmyk language is spoken; however, there is no clear indication that the data discussed below are different from the facts found in standard Kalmyk in any relevant respect. The main objective of the study reported here is two-fold. First, there is a descriptive goal. Available descriptions of Kalmyk causatives are mostly concerned with morphological issues and case assignment in canonical causative constructions, whereas a deeper analysis of syntactic properties of causative constructions, especially of their non-canonical uses, is generally lacking. The present study is intended to partially fill this gap. Second, there is a more theoretical goal. It will be shown that there are essential properties of Kalmyk causatives that can be hardly captured by the usual derivational approaches to causatives. Rather, causative verbs in Kalmyk will be viewed as a device for establishing a more or less direct correspondence between an event’s participants and syntactic slots. Although the scope of this paper is limited to one individual language, its findings can have broader typological relevance. In particular, I believe that taking the speaker’s perspective into account can deepen our understanding of causative constructions in other languages as well.

scholarly journals Mining Ground Surface Information Extraction and Topographic Analysis Using UAV Video Data

2020 ◽  
Vol 194 ◽  
pp. 05030
Author(s):  
Yin Yaqiu ◽  
Jiang Cunhao ◽  
Lv Jing ◽  
Wang Jie ◽  
Ju Xing ◽  
...  
Keyword(s):  
Land Surface ◽  
Image Data ◽  
Video Data ◽  
Shanxi Province ◽  
Ground Control ◽  
Surface Model ◽  
Control Points ◽  
Topographic Analysis ◽  
Ground Control Points ◽  
Data Source

Taking the Xiangwang bauxite mining of Xiaoyi City, Shanxi Province as the research object, the DJi “Wu”inspire2 model Unmanned aerial vehicle (UAV) was used to obtain the video data, image data and Ground control points (GCP) data of a typical pit in the study area. Based on the two kinds of data source (video data and image data), the Digital surface model (DSM) of the research area was acquired with or without ground control points through aerial triangulation and block adjustment. Using the DSM obtained by the two data source, the distribution of elevation, slope, slope direction, surface fluctuation and surface roughness was extracted and compared. Research shows that the DSM, acquired by the ContextCapture software without GCP, using video data obtained by aerial shooting around one interest point, can qualitatively reflect the topographic distribution of the land surface. The DSM got by the video data with the GCP can achieve the similar accuracy with the result obtained by image data, and the topographic information acquired by the two kinds of data source has highly similar characteristics in spatial and numerical distribution. It can be concluded through comparison and analysis of the topographical factors that steep slopes with complex topography and large elevation difference distributes in the northwest-central of the pit, of which northwest and southwest slopes can be easily eroded by wind and rain, so attention should be paid to slop stability monitoring and disaster prevention in this area. As a whole, the results show that video data obtained by UAV can not only reflect the dynamic changes of the land surface qualitatively, but also can describe the distribution of surface topography quantitatively through processing to get the DSM. It has great application potential in the field of disaster emergency monitoring and geological hazard risk assessment in mining areas.

scholarly journals DESARROLLO DE UNA METODOLOGÍA SENCILLA PARA LA GEORREFERENCIACIÓN Y MEDICIÓN DE DISTANCIAS A PARTIR DE IMÁGENES DE SATÉLITE SISTEMÁTICAMENTE GEORREFERENCIADAS

2016 ◽  
Vol 39 (1) ◽  
Author(s):  
Leonardo Gónima ◽  
Libardo E. Ruiz ◽  
Marcos E. González
Keyword(s):  
Satellite Images ◽  
Control Point ◽  
Ground Control ◽  
Gps Data ◽  
Control Points ◽  
Statistical Validation ◽  
Distance Measurements ◽  
The North ◽  
Ground Control Points ◽  
Representative Points

One of the main problems for a precise georeferencing and distance measurements from satellite images, especially in geographical zones with strong morphologic and environmental dynamics, lies not only in the difficulty for identifying ground control points (GCPs), but also in real limitations for accessing such places. In this work a relatively simple methodology is proposed for georeferencing and distance measuring from satellite images, based on the utilization of previously calculated reflectance images from the surface and then oriented toward the north (systematic georeferencing). From these images and setting a basic control point (pixel) P, measured with GPS, the other GCPs were obtained by measurements of distances defined from the P point to representative points (pixels) on the image, selected for its georeferencing. The statistical validation of the obtained results, using a different sample of GCPs measured with GPS, shows that the precision of the georeferencing and distance measurement utilizing the developed methodology is similar to that obtained by conventional procedures, such as image georeferencing from GPS data.

scholarly journals Preliminary Bouguer anomalies of western North Greenland

1980 ◽  
Vol 99 ◽  
pp. 153-154
Author(s):  
W.L Weng
Keyword(s):  
Ground Control ◽  
Control Points ◽  
Vertical Control ◽  
The North ◽  
Ground Control Points ◽  
Minor Part ◽  
Gravity Network ◽  
A Minor ◽  
Regional Gravity ◽  
North Greenland

During the summer af 1979 the Geodetic Institute, Copcnhagen, continued the North Greenland survey, which was initiated in 1978 (Forsberg, 1979). This comprised establishment of ground control points by help of Doppler instruments combined with barometric, triangulation and doppler-derived heights as vertical control. During 1979, as a minor part of the surveying programme, a regional gravity network was established for the area belween Hall Land and Nansen Land (fig. 66).

scholarly journals HYBRID GEOMETRIC CALIBRATION METHOD FOR MULTI-PLATFORM SPACEBORNE SAR IMAGE WITH SPARSE GCPS

2018 ◽  
Vol XLII-3 ◽  
pp. 1221-1228 ◽  
Author(s):  
G. Lv ◽  
X. Tang ◽  
B. Ai ◽  
T. Li ◽  
Q. Chen
Keyword(s):  
Large Scale ◽  
Calibration Method ◽  
Control Points ◽  
Sar Image ◽  
Sar Images ◽  
Geometric Calibration ◽  
Mountainous Regions ◽  
The North ◽  
Point Tracking ◽  
Ground Control Points

Geometric calibration is able to provide high-accuracy geometric coordinates of spaceborne SAR image through accurate geometric parameters in the Range-Doppler model by ground control points (GCPs). However, it is very difficult to obtain GCPs that covering large-scale areas, especially in the mountainous regions. In addition, the traditional calibration method is only used for single platform SAR images and can’t support the hybrid geometric calibration for multi-platform images. To solve the above problems, a hybrid geometric calibration method for multi-platform spaceborne SAR images with sparse GCPs is proposed in this paper. First, we calibrate the master image that contains GCPs. Secondly, the point tracking algorithm is used to obtain the tie points (TPs) between the master and slave images. Finally, we calibrate the slave images using TPs as the GCPs. We take the Beijing-Tianjin- Hebei region as an example to study SAR image hybrid geometric calibration method using 3 TerraSAR-X images, 3 TanDEM-X images and 5 GF-3 images covering more than 235 kilometers in the north-south direction. Geometric calibration of all images is completed using only 5 GCPs. The GPS data extracted from GNSS receiver are used to assess the plane accuracy after calibration. The results after geometric calibration with sparse GCPs show that the geometric positioning accuracy is 3 m for TSX/TDX images and 7.5 m for GF-3 images.

scholarly journals Remote sensing in the study of Late Bronze Age settlements in North-Western Crimea

2020 ◽  
Vol 26 (4) ◽  
pp. 299-310
Author(s):  
Tatiana Smekalova ◽  
Maja Kashuba
Keyword(s):  
Remote Sensing ◽  
Bronze Age ◽  
Google Earth ◽  
Late Bronze Age ◽  
Step Method ◽  
The North ◽  
High Resolution Satellite Images ◽  
Geophysical Surveys ◽  
Remote Sensing Methods ◽  
North Western

The article is devoted to the results of applying a comprehensive interdisciplinary methodology combining remote sensing methods, GIS, geophysical and archaeological research the Late Bronze for revealing and investigation of the Late Bronze Age settlements in the North-Western Crimea. The discovery of these settlements causes a certain difficulty, since they are buried under a layer of soil and do not have direct visual signs. A comprehensive step-by-step method of non-destructive remote sensing was developed, including the analysis of high-resolution satellite images in the Google Earth Pro resource, identifying promising areas by plant and landscape features, creating GPS routes for ground reconnaissance, geophysical surveys (magnetic and electromagnetic) on promising areas for identifying Late Bronze Age settlements, GPS mapping of surface material, point archaeological sounding. All the results obtained are placed in a special geo-information system, the substrate layers of which are detailed topographic, soil, geological, hydrogeological, digital relief maps. As a result, 48 new settlements of the Late Bronze Age were identified, including 19 settlements with double stone pens. These pens were first discovered only with help of remote sensing methods, especially magnetic surveying. The final answer about the existence and layout of the settlement of the Late Bronze Age before the archaeological excavations is given only by magnetic and electromagnetic surveys. The GIS created on the monuments of the Late Bronze Age in the North-Western Crimea will serve both scientific purposes and to preserve the cultural heritage of the Republic of Crimea, which is especially important in conditions of rapid economic development of land and the construction of trunk roads.

Opinion of students of medical university on methods of contraception and prevention of unwanted pregnancy

2021 ◽  
Vol 24 (4) ◽  
pp. 19-24
Author(s):  
Anatoliy К. Lebedev ◽  
Elizaveta A. Redka ◽  
Anastasia M. Bugay ◽  
Elizaveta O. Lunenkova ◽  
Maria N. Sokolova
Keyword(s):  
Informed Consent ◽  
Young Women ◽  
Unwanted Pregnancy ◽  
Scientific Research ◽  
State University ◽  
Contraceptive Methods ◽  
Western State ◽  
The North ◽  
Medical University ◽  
North Western

The article analyzes an opinion of 6th grade of young women, the 6th grade medicine students, on the topic of using contraceptive methods for preventing unwanted pregnancy. In the North-Western State University named after I.I. Mechnikov an anonymous poll was conducted by filling specially prepared questionnaires, that included 29 questions and informed consent for using the results of the survey in scientific research. The study included an opinion of 300 6th grade students with the age 22 to 33 years. The results of the survey about the most frequently used contraception methods by 6th grade students was provided as well as the purpose of using certain modern types of contraception, the awareness of students about the chosen methods of contraception.

scholarly journals ASSESSING HORIZONTAL POSITIONAL ACCURACY OF

2017 ◽  
Vol 43 (2) ◽  
pp. 56-65 ◽  
Author(s):  
Mohammad Ali GOUDARZI ◽  
René Jr. LANDRY
Keyword(s):  
Google Earth ◽  
Control Points ◽  
Viewing Angle ◽  
The South ◽  
Positional Accuracy ◽  
Displacement Problem ◽  
The North ◽  
The World ◽  
Spatially Distributed ◽  
The City

The horizontal positional accuracy of Google Earth is assessed in the city of Montreal, Canada, using the precise coordinates of ten GPS points spatially distributed all over the city. The results show that the positional accuracy varies in the study area between ∼0.1 m in the south to ∼2.7 m in the north. Furthermore, two methods are developed for correcting the observed positional errors: (a) using a set of transformation parameters between true coordinates of the geodetic points and their coordinates in Google Earth, and by (b) interpolating the misfit vectors at the geodetic points. The former method reduces the overall accuracy to ∼67 cm RMSE, whereas the latter one practically removes all the distortion (RMSE = 1 cm). Both methods can be developed for other places in the world subject to availability of appropriate control points. In addition, a displacement problem caused by the topography of the area and the viewing angle of the imaging satellite is discussed, and it is shown that the true positions can be shifted even up to several meters, as a consequence.

scholarly journals Evaluation of the global glacier inventories and assessment of glacier elevation changes over north-western Himalaya

2021 ◽  
Author(s):  
Shakil Ahmad Romshoo ◽  
Tariq Abdullah ◽  
Mustafa Hameed Bhat
Keyword(s):  
Western Himalaya ◽  
Google Earth ◽  
Landsat Data ◽  
Glacier Inventory ◽  
Field Surveys ◽  
The North ◽  
Digital Elevation ◽  
Elevation Changes ◽  
Elevation Model ◽  
North Western

Abstract. The study evaluates the global glacier inventories available for the study area viz., RGI, GAMDAM and ICIMOD, with the newly generated Kashmir University Glacier Inventory (KUGI) for three Himalaya basins; Jhelum, Suru and Chenab in the north-western Himalaya, comprising of 2096 glaciers spread over an area of 3300 km2. The KUGI was prepared from the Landsat data supplemented by Digital Elevation Model, Google Earth images and limited field surveys. The KUGI comprises of 154 glaciers in the Jhelum, 328 in the Suru and 1614 in the Chenab basin, corresponding to the glacier area of 85.9 ± 11.4 km2, 487 ± 16.2 km2 and 2727 ± 90.2 km2 respectively. The investigation revealed that most of the glaciers in the study area are

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