Which GPS error cannot be reduced using differential corrections – Multipath

discuss vector model – based on points, lines, areas, smaller data sets, based on coordinates, accurate and attractive data

Azimuths – horizontal angles measured clockwise from any reference meridian Surveying azimuths are generally measured from north Astronomers and the military have used south as the reference direction NGS used south as its reference for Azimuths in NAD27 and north for NAD83 They can range from 0to 360 Azimuths may be geodetic, astronomic, magnetic, grid, record or assumed

xvi. C/A code – Course acquisition code is a timing code that is modulated on L1 channel only

A and B – Only section shared between both shaded

spatial analysis – investigates patterns in an between spatial data

network routing and analysis, 3D analysis, spatial statistics

network routing and analysis, 3D analysis, spatial statistics

right – direction of increase degrees and decrease zone number for UTM

x. Aspatial data – information not regarding location of a GIS feature

burden of production – the need to produce enough evidence that you conclude an assumption is true…

What are the 5 basic GIS Tasks? – 1)Input

2)manage

3)manipulate

4)Quarry

5)visualize

2)manage

3)manipulate

4)Quarry

5)visualize

Dr. John Snow – London cholera outbreak. Tracing back to the source with map-based analysis.

Spacial Sciences/GIS – Remote sensing, imaging science, Geographical information systems (GIS), Global Navigation Satellite System (GNSS) e.g.) GPS, Geodesy, Surveying, Digital Cartography, Computer Modelling, others…key : linkages and new technologies.

disadvantages of decomp – -performance: too many tables

-disk space can be cheaper than time spent

-too mant link to link can be confusing. hard to update

-disk space can be cheaper than time spent

-too mant link to link can be confusing. hard to update

Conformal Projection – A projection that preserves the correct shapes of small areas. In a conformal projection, graticule lines intersect at 90-degree angles, and at any point on the map the scale is the same in all directions. A conformal projection maintains all angles at each point, including those between the intersections of arcs; therefore, the size of areas enclosed by many arcs may be greatly distorted. No map projection can preserve the shapes of larger regions.

keeps the features and attributes

of two data layers retaining the geometry

of the input layer and the area where the

identity layer overlaps the input layer. – Identity

of two data layers retaining the geometry

of the input layer and the area where the

identity layer overlaps the input layer. – Identity

distance =` – travel time X speed of light

What are the 5 basic GIS Tasks? – 1)Input

2)manage

3)manipulate

4)Quarry

5)visualize

2)manage

3)manipulate

4)Quarry

5)visualize

Azimuthal – (Lambert Azimuthal Equal Area) -good for global views

burden of production – the need to produce enough evidence that you conclude an assumption is true…

A GPS receiver uses trilateration to compute its own position. What are the fiducial marks that a receiver uses? – The SVs

WGS-84 – geoid model reference ellipsoid