Monday, October 3, 2011

GIS Lab 5c - Map

The Africa Animal Wildlife Map while using the Conservation reference, I am able to create the map of the wildlife in the African safari, Congo Basin, and not much in the Sahara. These dots present animal figures and location where these main animals settle in, Blue for Elephant, Black for Zebra, and Yellow for Giraffe.

GIS Lab 5b - Map


The African Countries Map depicts themselves by different colors and labeling thier names on to them. If the map only consist of having precised symbols, it will be hard to distinguish which country is which.

 The Africa Rivers Map shows what major rivers cross and come about, Perennial rivers are the bolded ones and Intermittent rivers are the lightly shown ones.

GIS Lab 5a - Map

The Continent of Africa, the cities of each country are labeled with their names.

Sunday, September 25, 2011

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? -


Monday, September 19, 2011

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. 

Sunday, September 18, 2011

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.

Wednesday, September 14, 2011

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.