GIS Lab 4 pt.2

Data Formats Qs & As

•  Learn the data formats in ArcGIS & understand how each spatial file is constructed.  

1. What type of vector dataset is each one? -The type of  dataset that the caves converts to is a Point which is 0-dimensional, secondly the Mable/land is used as a 2-dimensional Polygon dataset, and lastly the Line dataset is mostly known for streams and roads which are 1-dimensional.

2. Which of these are used to save each other of the 3 datasets? -Well, all 3 datasets caves, mable, and streams are saved on the Shapefile format.

3. All six extensions files that caves, streams, and marble datasets have are DBF file, PRJ file, SHP file, SHX file, SBN file, and LOCK file.

4.  What information is given from the .prj files? -

5. Define what each type of the following files are: .shp- shape format, .prj- projection format, .shx- shape index format, .dbf- attribute format, and .sbn- spatial index format.

6. The type of data do you suppose that the .dbf file contains? -
7.What happens when Mineral King geodatabase in ArcCatalog? -When I opened the MK geodatabase, it showed me over 10 datasets that contained Vegetation, Geology, Hydrology, Infrastructure, Karst, Boundaries feature classes. Others were raster datasets like, aspect, derm, DRG_24K, hillshade and slope.
8. What program is prompted to open as you tried opening the gbd (geodatabase) from here? -



GIS Lab 4 pt.1

1. One exported map with all three datasets projected. The given datasets were Caves (dots), Streams (lines), and Mable/land (polygons). The purpose was to aligned all datasets correctly with the proper projections, datums, and geographic coordinate systems. At first caves and land/polygon had the same projection, the Transverse Mercator while the streams were in the Lambert Conformal Conic prj. that was the reason why streams didn't show in the ArcMap at first. Secondly, caves and streams are in the coordinates and datum of GCS North America 1983 while mable/land was in datum and GCS North America 1927. If the datum and coordinate was not changed in the mable/land, then the datasets wouldn't have been aligned correctly. So then the with proper coordinations of GCS NA 1983 and projections of Transverse Mercator the 3 datasets on the map (top) are aligned properly. 

GIS Lab 3 - Ex. 13b

The Coordinate System Project of North America Albers Equal Area Conic Prj. (top)

The North America Lambert Conformal Conic. (top) 

5. Export a separate map following step 5 in exercise 13b. (blue projection)
6. The two matching projections have a slight difference other than color, the Lambert (blue) and the Albers (green) have much of the same properties, but its where the cities are located on the diagrams. Its just that the cities locations are in the wrong place and the layers don't align correctly.

GIS Lab 3 - Ex. 13a

1. The type of projections that is used in exercise 13a were three versions of Albers equal area conic projections that depicts areas in middle latitudes for the most part.
2. A datum, a set of reference points on the Earth's of baseline measurements, it also contributes as a XY coordinate system. For all dataset/dataframes they all have the same datum as GCS_North _American_1983.
3. The largest US state in area is Alaska with a total of 663,268 sq mi
(1,717,854 km) in area.
4. Apparently in step 19 of exercise 13a, the state that appears to be the largest is again Alaska.

GIS Lab 2 - Ex. 4c

5. What is a Data Frame? A data frame contains different sets of data which is related to same subject that person works only more data frames are added. But not all data frame are the same, meaning they have different views of the data. For example, GIS Lab 2 ex. 4c has two data frames.
6. The main focus of the second data frame is the Area of Disapperance where Earhart and Noonan were given wrong coordinates and not enough flight info in Lae where the two paths disperse. The red path was the actual route to Howland Island, the other path is the wrong one which Nikumaroro Island.  

GIS Lab 2 - Ex. 4b

Ch. 4 Qs- 4. The type of dataset I would use to determine the depth of the ocean from East Oceania, would be the raster dataset of seafloor elevation and its seafloor layer file.

GIS Lab 2 - Ex. 4a





1. Located under the map, the feature classes that is used in exercise 4a are like a group points, lines, polygons and sometimes cities/countries, for so the first 3 feature classes are also known as vector data.
2. While using the "Info" block on Australia, the info block managed to find identity results the country for instance, the population of Australia is a total of 17, 827,520.



GIS Lab 2- Ex. 3c

7. In exercise 3c, while using the attribute table to find the cities, Earhart and Noonan encountered 28 cities during her flight journey.
8. While "Sorting" the length field of Earhart's flight, the shortest leg came out to be 793 kilometers (492 mi.) from Khartoum, Sudan to Massawa, Ethiopia coast to the Red Sea.
9. What was approximately the longest leg of her flight? -The longest leg of the flight was approixmately 3184 km. from Natal, Brazil across the Atlantic to Saint Louis, Dakar but the aviators were 175 km off course to Dakar , so with better flight plans it would of been 3009 km.   

GIS Lab 2 - Ex. 3b

The South Pacific
4. Where was the end of Earhart's "planned" flight path? - The end of the "planned" flight path ends somewhere in the South Pacific in  Howland Island via to Hawaii and then to California.
5. "Measure" tool to calculate the distance between the end of the planned route and probable route. - Using the measuring tool from Howland Island (planned route/blue) to Nikumaroro Island (probable route/yellow) its about 768.552744 km. thats a rounding of about 770 km. (478 mi.)
6. What was the name of the island she should have completed her journey? - Knowingly, the last island is Howland Island via northeast to Hawaii.

GIS Lab 2 -Ex. 3a

1. Suggest an appropriate order for each data layer from top to bottom? An apprpoiate order for the layers that would make more sense would be putting Earharst's cities first (top), Flight route second, Countries third, and the Graticule last (bottom).
2. Name all US cities along Earhart's path: Oakland, Tucson, New Orleans, & Miami
3. Name other countries Earhart flies over: Karachi, Bangkok, Signapore, Darwin, & Natal

GIS Lab 1 - Own Map

View Driving routes to Perquin, El Salvador in a larger map http://g.co/maps/38wyw Location Morazan, El Salvador C.A. for reasons of putting this map, it was unfinished from the original map. The map was missing a few routes and places where people/tourist can go, visit, and be aware of while going to the North Eastern outbacks of El Salvador. So then I modified it with a few details for people/tourist can convey and make use of this map to get to the town of Perquin to visit the Revolutionary Museum and Recreation Site.