Integrating Core and Aeromagnetic Datasets to Evaluate Mineral Potential of Southern Nupe Basin, Nigeria

Aeromagnetic and core drilled data covering parts of southern Nupe Basin was acquired and interpreted with the view to evaluating the mineral potentials of the area through interpretation of the structural features in the area; determination of the curie isotherm depth; and correlation of aeromagnetic outcomes with the core sample data from the area. Two major regional fault trends were interpreted, trending, Northeast–Southwest (NE–SW) and NNE–SSW with minor northwest–southeast (NW–SE) directions. Two depth sources in the area are delineated namely; zone of shallow seated basement which ranges from 0.42km to 1.5km and zone of deeply seated basement which ranges from 1.91 to 3.50km.Results of qualitative interpretation of the Total magnetic intensity map (TMI) and Residual intensity map reveal that the magnetic intensities ranges from 7500 to 8460 nano-Telsa (nT) and -220 to 240 nT respectively. The depth to the centroid and top of the magnetic caustic bodies ranges from 9.00 to 17.10km and 0.4 to 3.10km respectively. Juxtaposing the topographical and core drilling data reveals that the oolitic iron ore level follows the topographical level which implies that the topography of the area controls the configuration of the iron ore deposit level. All these deduction are made considering the geology of the area.

Hydraulic analysis of Semarang River in supporting the drainage channel as water tourism

The Semarang River is a flushing channel located in the Semarang River Drainage Sub-System and has the potential to be used as a water tourism area with the concept of Historical River Front City Walk. The planned water tourism area is in the form of procuring boats in the Kota Lama area, which is a historic area in the city of Semarang. This analysis aims to hydrology and hydraulics model of the Semarang River using SWMM 5.1. The method is carried out by observing the existing conditions of the study area, determination of flood discharge plans, and hydraulic analysis. The analysis starts from the Simongan Weir Bridge upstream of the Semarang River to the Berok 2 Bridge, which is located in the Kota Lama area. The results showed the intensity of rainfall designed 25 years is 155.7 mm/hour with the capacity of the Semarang River in existing and planning conditions can still accommodate the flood discharge plan, and a weir with a height of 1 m is needed to maintain the water level in boundary condition so that boat tours can operate optimally.

The practice of the calculation of land plot physical area

The issue of physical area calculation has been scrutinized in the article. The research rationale is predefined by the influence of the accuracy of land plot area determination on the economic, environmental, and social components of land tenure. The issue of physical characteristics of a land plot at the determination of its area has been singled out in the article. The goal of the research is the substantiation of the use of land plot physical area calculation methodology in the current social and economic environment. The notion of land plot physical area has been provided. The trends of the application of land plot physical area determination methodology have been systemized. The methodology of land plot physical area determination by means of marking out polygons and determining the average slope has been used. The calculations of land plot area considering the relief at various quantities of the division of a triangle side have been made. Comparison with the calculation of area without considering the relief has been performed. The regression analysis of the dependence of physical area change with the change of the quantity of triangle side divisions has been carried out. The calculation of the relief complexity index for the determination of land plot physical area has been presented. This calculation confirms the economic viability of the determination of a land plot physical area by the suggested methodology at land improvement and agrotechnical activities. The result can be used for various works connected to the spatial aspects of land use and in the following scientific researches.

Approximations, Errors, and Misconceptions in the Use of Map Projections

Global geodetic techniques currently can provide the user with worldwide millimeter accuracy. Preservation of this degree of accuracy in derived products is far from straightforward and may leave vast room for trouble in the different steps involved in the collection, storing, processing, analysis, and delivering of geospatial information. This paper is envisioned to serve as a guide for those utilizing map projections, in any possible form of application-cartography, GIS, remote sensing, photogrammetry, etc., to the common (and not so common) causes of error and misconception. This work also explores and questions the validity of some of approximations that are routinely implemented and quantifies the corresponding impact. These include the impact of neglecting meteorological corrections, reduction to ellipsoid and grid scale factors for distances, meridian convergence and arc-to-chord correction for angles, and mixing up with different frames and reference systems, height systems, or deceptively similar map projections. Correct indications are also given for accurately performing geospatial operations such as intersection of lines, determination of minimum point to line distance, and area determination for cadaster, which are often performed with suboptimal accuracy.

Real-Time Ultrasonic Evaluation Of Swine

This study shows no difference in the backfat data collected on live and dead animals. In adjusted data, barrows had more backfat according to sonic and actual carcass measurement. There was a significantly (P<0.05) lower value in gilts in the first and last rib positions and in barrows in all positions but the tenth rib for sonic data as compared with carcass measurement. A high and significant (P<0.01) correlation existed between sonic and carcass measurements of fat thickness across sex. Within each sex, correlation was highest on the tenth rib followed by the last rib in gilts and the last lumbar in barrows. There were no significant differences in longissimus area measurement taken ultrasonically or in the carcass although correlations between them were high, being higher in gilts. 3MHz scanning produced greater accuracy in gilts than barrows for fat thickness and longissimus area determination, 5MHz, however, gave data that were closer correlated with carcass data. Except for the first rib position, there were no differences between scans taken on the hot carcass and actual carcass measures taken on the chilled right and left sides 48h later. The result suggests that hogs can be scanned a forthnight before slaughter and the data can be used in computing hog carcass yield at the point of sale. It also suggests the possibility of complete grading for hot carcasses and may further encourage hot processing if adopted. In cold processing situation, it may remove the necessity to enter the cooler for carcass measures.

ABOUT PLOT AREA DETERMINATION IN CASE OF REQUIRED COORDINATE SUPPORT DEFICIENCY

The article is devoted to the relevant problem of the adjustment of different-time and different-accuracy results of land plot coordination support which highly require cadastral registration. The most significant factor in the given case is the area of a land plot, which is its main parameter being taken into account in determination of type of permitted use, cadastral value, land tax and rent. Therefore, area determination requires rather high accuracy, in particular, for garden and vegetable garden plots. According to statistics the significant part of earlier registered land plots contains errors, that’s why there are often the cases when adjacent plots overlap or their area is determined obviously incorrectly. Such situations require solutions, which are based on repeated cadastral measurements with possible use of several options for determination of adjacent plots areas, which were considered in working formulas of Heron and Brahmagupta. The given formulas do not use land plot boundary points coor-dinates, that’s why they can perform some control functions in cases of repeated coordinate determi-nation in such situations. The result of the present research was the formulation and solution of the problem of clarifying the location of gardening land plots and summer cottages in general that were previously approximated to the locality. The results of cadastral activities characterized the essence and content of using the formulas of Geron and Brahmagupta for calculating the values of areas, an analysis is carried out and practical recommendations for their use are given.