An analysis of water-level contour maps of southwestern Louisana, 1952 and 1953

1954 ◽  
Author(s):  
S.W. Fader
Keyword(s):  
Water Level ◽  
Contour Maps ◽  
Water Level Contour

Using Synthetic Data and Artificial Wells to Teach the Construction and Use of Water Level Contour Maps

2008 ◽  
Vol 56 (4) ◽  
pp. 317-323
Author(s):  
Michael John Nicholl ◽  
Alexander Grigor Baron ◽  
Colin Robins ◽  
Joshua Boxell ◽  
Yuyu Lin
Keyword(s):  
Water Level ◽  
Synthetic Data ◽  
Contour Maps ◽  
Water Level Contour

scholarly journals Static Water Level and Elevation Analyses of Shallow Hand-Dug Wells in Ilorin Metropolis, Nigeria

2020 ◽  
pp. 48-53
Author(s):  
Oluwaseun E. Odipe ◽  
Henry O. Sawyerr ◽  
Solomon O. Adewoye
Keyword(s):  
Water Level ◽  
Spatial Information ◽  
Groundwater Resources ◽  
Contour Maps ◽  
Static Water ◽  
Dug Wells ◽  
The Difference ◽  
Elevation Model ◽  
Development And Management ◽  
Static Water Level

Aim: This study was conducted to reveal the depth to water level and surface elevation in selected hand-dug wells within Ilorin metropolis to assist in planning and management of water resources within the study area. Place and Duration of Study: The study was conducted in Ilorin metropolis, North Central,           Nigeria. Methodology: A total of twenty-six (26) hand-dug wells were sampled and relevant spatial information was acquired using a handheld GPS; data collected include: longitude, latitude, elevation and depth to water, then the static water level above sea level was estimated by the difference between depth to water and elevation. Statistical analyses such as mean and standard deviation were determined, also a base map, contour maps and 3-D elevation model of the study area were produced using ArcGIS 10.4 and Surfer 10 software. Results: The depth to water within the study area ranges between 1.6 m and 13.3m, while elevation were between 284.1 m and 377.9 m, then the static water level ranges between 270.8 m and 371.4 m. The static water level contour map showed a radial and multidimensional groundwater flow pattern trending in the NE–SW and NW–SE directions while the 3-D elevation model revealed an undulating terrain. Conclusion: The study concluded that the depth to groundwater is relatively shallow and this can guide proper development and management of groundwater resources within the metropolis.

Analysis of the 9th November 1990 flare

2000 ◽  
Vol 179 ◽  
pp. 229-232
Author(s):  
Anita Joshi ◽  
Wahab Uddin
Keyword(s):  
Image Processing ◽  
Two Dimensional ◽  
Temporal Behaviour ◽  
Contour Maps ◽  
Dimensional Measurements ◽  
Processing Software ◽  
Image Processing Software

AbstractIn this paper we present complete two-dimensional measurements of the observed brightness of the 9th November 1990Hαflare, using a PDS microdensitometer scanner and image processing software MIDAS. The resulting isophotal contour maps, were used to describe morphological-cum-temporal behaviour of the flare and also the kernels of the flare. Correlation of theHαflare with SXR and MW radiations were also studied.

Small Computer System for Micrograph Analysis

1981 ◽  
Vol 39 ◽  
pp. 270-271
Author(s):  
J. F. Hainfeld ◽  
J. S. Wall
Keyword(s):  
Large Range ◽  
Small Computer ◽  
Black And White ◽  
Contour Maps ◽  
Points Of Interest ◽  
Computer Aided Analysis ◽  
Specialized Hardware ◽  
Additional Memory ◽  
Selection Of ◽  
Publication Quality

Cost reduction and availability of specialized hardware for image processing have made it reasonable to purchase a stand-alone interactive work station for computer aided analysis of micrographs. Some features of such a system are: 1) Ease of selection of points of interest on the micrograph. A cursor can be quickly positioned and coordinates entered with a switch. 2) The image can be nondestructively zoomed to a higher magnification for closer examination and roaming (panning) can be done around the picture. 3) Contrast and brightness of the picture can be varied over a very large range by changing the display look-up tables. 4) Marking items of interest can be done by drawing circles, vectors or alphanumerics on an additional memory plane so that the picture data remains intact. 5) Color pictures can easily be produced. Since the human eye can detect many more colors than gray levels, often a color encoded micrograph reveals many features not readily apparent with a black and white display. Colors can be used to construct contour maps of objects of interest. 6) Publication quality prints can easily be produced by taking pictures with a standard camera of the T.V. monitor screen.

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