Which satellite image is better for buildings and roads extraction WorldView1, 2 or 3?

Which satellite image is better for buildings and roads extraction WorldView 1, 2 or 3? Is it possible to extract built up features without panchromatic band? Please provide references. Thank you.

08 September 2019 4,524 4 View

How can we build a 3d model from WorldView images (Not Stereo)?

How can we build a 3d model from WorldView images? one or more images . There is no panchromatic band. Please share references Thank you

08 September 2019 6,538 3 View

How to calculate confidence interval after running multi regression analysis in excel?

Case 1: I have a large sample (n =100). After I ran multiple regression in excel, I want to know what is the confidence level of predicted values. How can I calculate CI for a certain predicted...

04 May 2019 7,224 5 View

Why do we use speckle filtering and multi-look paramertization?

When we work with Sentinel 1, what are the main functions/ importance of speckle filtering and mutli-look paramertization? If they remove noise only, what cause this noise? What will happen if we...

03 April 2019 7,480 3 View

How do we map and identifying crops types?

Is there a method or a GIS/RS library that enable us to identify crops types (Cotton, sugar cane, rice, wheat... etc) without the need to collect samples from agriculture land? or Is there a...

31 December 2018 5,332 6 View

IKONOS and free software?

Is there any free software that we can use when we work with IKONOS data? What are they?

31 December 2018 8,791 7 View

Is it possible to measure "effective sky temperature" using remote sensing? what products are used?

Is it possible to measure "effective sky temperature" using remote sensing? what satellite image products are used?

06 July 2018 5,767 1 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Why should we choose deep learning to machine learning? Why is CNN better for image classification? Can I get Typical Answer?

What Characteristics makes CNN work better?

03 March 2021 1,458 4 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Can we block unwanted images during the x-ray prediction?

i am try to classify the x-ray images. During classification , can i block unwanted images (except x-ray image).

03 March 2021 7,100 1 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Is there a classification scheme for rock cavities or caverns with respect to their size and shape?

The range of forms and sizes of cavities in rock is very big. Is there a classification scheme for rock cavities regarding their size and shape?

02 March 2021 4,511 3 View