Answer:
Overlay is a GIS operation that superimposes multiple data sets (representing different themes) together for the purpose of identifying relationships between them.[2]. An overlay creates a composite map by combining the geometry and attributes of the input data sets. Tools are available in most GIS software for overlaying both Vector or raster data.
Explanation:
Before the use of computers, a similar effect was develioped by Ian McHarg and others by drawing maps of the same area at the same scale on clear plastic and actually laying them on top of each other.
Answer:
it depends on each person and that's what makes it so unique. You as a person gives your own life meaning. If your an artist maybe you live to share your passion of art with other people, if you have a partner you love maybe your meaning of life is to spend your time with them as happily and lengthly as possible. So in my opinion the meaning of life depends on the person, each person decides their meaning of life.
Scientists can't be sure about the early atmosphere and can only draw evidence from other sources. For example, volcanoes release high quantities of carbon dioxide. Iron-based compounds are present in very old rocks that could only have formed if there was little or no oxygen at the time.
With Rome. Silk Road was linking China with the West and it carried goods and ideas between the two great civilizations of Rome and China.
I think the answer is B or C. It was limited but I'm not sure that it completely closed. Hope this helps.
