Raster (Arithmetic) Overlay

Raster overlay superimposes at least two input raster layers to produce an output layer. Each cell in the output layer is calculated from the corresponding pixels in the input layers. To do this, the layers must line up perfectly; they must have the same pixel resolution and spatial extent. If they do not align, they can be adjusted to fit by the preprocessing functions discussed in Chapter 3. Once preprocessed, raster overlay is flexible, efficient, quick, and offers more overlay possibilities than vector overlay.

Marek has successfully executed extensive reforms and transformations in Tax and Customs Board. He steered it towards a customer-driven organisation that enjoys a high level of public trust. Most notably, Marek challenged long-held assumptions and positively disrupted the Tax and Custom's Board by re-defining its vision as supporting businesses and their growth. After a very successful career in public sector Marek joined Nortal to advise the public sector financial systems development and support implementation of VAT in Oman with change management.

In linear regression, the model specification is that the dependent variable,
y
i
{\displaystyle y_{i}}
is a linear combination of the * parameters* (but need not be linear in the * independent variables* ). For example, in simple linear regression for modeling
n
{\displaystyle n}
data points there is one independent variable:
x
i
{\displaystyle x_{i}}
, and two parameters,
β
0
{\displaystyle \beta _{0}}
and
β
1
{\displaystyle \beta _{1}}
: