Jhedy Amores

10 Questions 12 Answers 0 Followers

Questions related from Jhedy Amores

High resolution worldwide satellite imagery?

Are there any online sources for high-resolution (~1m or less, preferrably less) worldwide imagery? Paid data are fine, I just need sources. Thank you very much!

19 September 2018 8,964 3 View

How to check discrete data for similarity (How to statistically compare discrete data)?

Suppose you have a set of point data which contains two variables (say var1 and var2), both of which have discrete values (say 1, 2, and 3). You try to map them (see attached files var1.jpeg and...

27 September 2017 7,145 2 View

How to determine best interpolation search radius and cell size/resolution?

Is there a way or an equation to determine the best distance for search radius to be used in interpolation? Also, how do you decide for the cell size or the resolution of the resulting raster...

21 June 2017 704 4 View

Calculate weathering intensity indices?

Hi! I have these rock types used in my research (see attached image). May I know which among these I can calculate the weathering indices (CIA, CIW, MWPI, Vogt, WI) on? Thank you very much!

12 June 2017 4,311 2 View

Calculation of weathering intensity for non-silicate rocks?

Can the weathering indices such as CIA, CIW, MWPI, Vogt Ratio, and WI be used to calculate the weathering intensity of non-silicate rocks? If so, what changes to the equations would be considered,...

10 May 2017 3,122 2 View

Why is there a discrepancy in my weka J48 decision tree and attribute selector?

I understand that weka's J48 uses Gain Ratio as a method in determining how to split the tree, but when I compare the first attribute in the attribute ranking and the attribute by which my...

01 February 2017 5,218 2 View

How to calculate Chemical Index of Alteration and other weathering indices?

I'm quite confused about the calculation of the CIA or the Chemical Index of Alteration (same with the other weathering indices). Would the weight percent do for the calculation? Or is the...

23 January 2017 436 14 View

How do I add XY data to a DAT file?

I have a DAT file with no XY coordinates, just the value field (see attached DAT file). Suppose I was given the boundaries of the DAT file, as well as the supposed resolution (say 20m), how do I...

23 September 2016 1,252 3 View

How to calculate Root Relative Squared Error and Relative Absolute Error in Weka?

I was trying to calculate manually the Root Relative Squared Error and the Relative Absolute Error given by Weka, but I can't seem to get it. Can someone show me explicitly how to do it?, Or more...

02 September 2016 9,512 6 View

Why does ILWIS set elevations above 1000 as "NO DATA" when exporting?

When I process my elevation grid file in ILWIS, it shows the cells with elevations above 1000. However, when I export the grid file as an Arc ASCII grid file using ILWIS (I am having problems in...

04 May 2015 8,255 5 View