20 Questions 18 Answers 0 Followers
Questions related from Elijah A Njoku
I am setting up an experiment to estimate the accuracy of different interpolation algorithms for generating a spatially continuous rainfall data (gird) for a certain area. The data density (number...
04 March 2022 5,787 3 View
A vibrator was operated at different pressure (psi) levels and the impact of the vibrator (Hertz) was measured at different distances away from the vibrator. Measurements were taken 1-hour daily...
06 August 2020 6,368 1 View
I need to plot /run trend analysis on 5 variables simultaneously in XLSTAT. Measurements were taken same dates, and as such date series is same. Having the graphs together enables easy comparison....
04 June 2020 9,234 1 View
I am working at the City scale and 0.5x0.5 minutes spatial resolution climate data from CRU seem very coarse. I was wondering if I could get a better resolution. I wouldn't also mind getting the...
24 February 2020 5,688 5 View
It appears SDBs requires hydrographic chart for the calculation of the depth extinction parameters and for validation, etc. However, I can't yet get any such chart in my study area. I was...
29 October 2019 559 3 View
Often Oil spills on the terrestrial landscape including the wetlands. This could be either operational or as a result of sabotage. I will like to know if there is a technology that can be used to...
19 July 2019 2,226 3 View
I have read a few things from the ASF website with a view to finding out the vertical accuracy of the ASF 12.5m by 12.5m DEM, but am yet to be fortunate. I was wondering if anybody knows and is...
20 June 2019 3,457 3 View
I have a data with this coordinate reference system (wgs84 30N CM 3W). and I need to load the data in ArcGIS but I can't seem to find it exactly in ArcGIS. First, I will like to know if it's same...
11 March 2019 3,996 6 View
It's true that elevation from GPS receivers are measured from the ellipsoid as a reference rather than the geiod/mean sea level (MSL). This topic is a little trick though. But my question is...
27 August 2018 8,240 10 View
I have run a GNOME oil spill simulation using the NOAA GNOME software. I have also been able to import the splots into ArcGIS using the GNOME import tool for ArcGIS. However, I need to convert the...
26 June 2017 5,133 0 View
Several studies have analyzed the impact of Urbanization on LST using different Remote Sensing products. Often, the objective is to find how urban land cover /urbanization (through replacement of...
02 January 2017 8,934 4 View
I have soil contaminant samples collected at different depths/layers. I generated a contaminant surface at each depth/layer using ArcGIS krigging tool. However, I need to have a vertical feel of...
16 August 2016 1,645 7 View
I need to estimate the changing water depth of a lake over time using remote sensing. I will like to read related works and perhaps comments on how this could be done. Pointers to publicly...
13 March 2016 3,533 2 View
I need to interpolate some soil contaminant values vertically across the layers (top to bottom). My values are taken from different depths/layers (1.5m, 3.0, 7.0, ). I need to be able to have...
01 March 2016 6,744 6 View
I need to model ground water flow and Particle tracking using ArGIS tools listed above. However; I will like to get some details on how the required data can be acquired and what the results look...
29 December 2015 1,338 1 View
I have 3 soil samples taken at different depths (the first 2 samples were taken at 7 meters and the 3rd sample point at 9 meters) and the three points are about 90 meters apart. I need to create...
20 November 2015 3,628 9 View
Using Landsat Images of 2002 and 2014, I tried to investigate the land-cover change between the period of 2002 and 2014. A land cover classification using same images reveals that Urban land-cover...
23 August 2015 1,709 15 View
I need to estimate Land Surface Temperature (LST) of some areas in the Tropics but most of the available Landsat images for the areas are cloud covered (covered up to more than 40% in some cases)....
27 April 2015 2,258 7 View
Having converted their Landsat Images from uncalibrated DN data to radiance, some authors have gone ahead to the second step of converting to radiant temperature in (degrees kelvin) while others...
08 February 2015 6,863 3 View
I am in need of Open Source image analysis softwares that can help me AUTOMATICALLY estimate Land Surface Temperature (LST) from Land-Sat and other images. Given budget constraints and other...
04 January 2015 2,697 4 View
