Datum

level which is regarded as a base from which other levels can be counted. For example, sea level is often used as a datum level against which the height of land and depth of the sea bed are measured. A geodetic datum is an abstract coordinate system with a reference surface (such as sea level) that serves to provide known locations to begin surveys and create maps. In this way, datum act similar to starting points when you give someone directions. For instance, when you want to tell someone how to

1. One of the pieces that really stood out to me was the one called Tidal Datum. The data that she has chosen helps create a form that looks like the waves of the twenty-nine days of a full lunar cycle and this reveals the patterns of the tides of the Bay Area. She made it out of flat-bar steel and it is framed within the structure of a walnut table. She had to go through the National Oceanic and Atmospheric Administrations Online Historic Tide Database in order to gather all this data. The subject

The State Plane Coordinate System (SPS or SPCS) is a set of 124 geographic zones or coordinate systems designed for specific regions of the United States. Each state contains one or more state plane zones, the boundaries of which usually follow county lines. Multiple state zones are used to limit distortion errors due to map projections. The system is widely used for geographic data by state and local governments. Its popularity is due to at least two factors. First, it uses a simple Cartesian coordinate

1. What is the difference between a coordinate reference system and a projection (transformation)? Why would you want to change your coordinate reference system during any analysis? Remember that a coordinate reference system is a special type (and thought of as a key component) of the broader concept of ‘spatial reference system’. The difference between a coordinate reference system and a projection (transformation) are that a projection provides various mechanisms to project maps of the earth's

that shoot a foam disc similar the competition projectile. Our Datum for the decision matrix (VI in Fig.1) is a ramp with a spring-loaded striker to propel the disc. The Pin model is a hybrid of the Shooter and the Datum (V in Fig.1) by utilizing the ramp from the Datum and the rubber band propulsion from the Shooter. The Decision Matrix is made up of eight criteria for comparison, to analyze the five concept solutions based on the datum. Accuracy and price were weighted

Factors that Affect the Rate of Reaction of Peroxidase Purpose: To determine the effect of various factors on the rate of reaction between an enzyme and its substrate, and also to determine the optimal ranges under which the enzyme activity is maximized. Also to determine whether saline and alcohol are inhibitors or activators Hypothesis: PH factor prediction: I predict that as the pH increases so the activity of the enzyme will increase until it reaches optimum pH range (pH 7) because the

4. What type of geometric tolerance has no datum features? Which of the form tolerances is the most common? Form controls Flatness What type of geometric tolerances indicates an angular relationship with specified datum Orientation controls features? What is the name of the symbol that is used to identify physical features of a part as datum features and should not be applied to centerlines, center planes, or axes? Datum feature symbol 5. 6. Datum feature identifying letters may be any letter

person’s perception of an object is mediated by the perception of a mind-dependent entity known as “sense datum.” These “sense datum” are formed over the course of our lives by certain ideas we are directly ware of, and we use these ideas to guess the existence of min-independent objects that are causing these ideas. Essentially, direct and indirect realists disagree on the existence of these “sense datum” and whether they are needed for perception.

Some other based on old (local) system. With so many geodetic datums in current use, it is becoming almost common practice to

Testing statistical significance is an excellent way to identify probably relevance between a total data set mean/sigma and a smaller sample data set mean/sigma, otherwise known as a population mean/sigma and sample data set mean/sigma. This classification of testing is also very useful in proving probable relevance between data samples. Although testing statistical significance is not a 100% fool proof, if testing to the 95% probability on two data sets the statistical probability is .25% chance