Valentino

STHT 506 - GEOGRAPHIC INFORMATION SYSTEMS Homework Assignment#1 (Final Submission) Requirement: (a) Explore the Common Spatial Data Infrastructure ( https://portal.csdi.gov.hk/geoportal/ ) and download spatial data from there. Use 4 or more layers in your QGIS program for visual display. This is your own thematic map. (b)  Write (within 300 words) about your observation of the datasets of this website and evaluate their usefulness for future GIS projects. ANSWER - PART (a) Fig. 1 shows the locations of the 41 campsites and related camp facilities (like locations of visitor centers, viewing points, water filling stations, barbecue sites, toilets as well as mountain bike trailers) in country parks in Hong Kong. By using this data file, we can create a map for campsites fans to get all these information of facilities for further decision making. ANSWER - PART (b) The usefulness of these datasets for future GIS projects can be evaluated based on several factors: Variety of Spatial Data...

STHT 506 - GEOGRAPHIC INFORMATION SYSTEMS Homework Assignment#4 (Final Submission) Requirement: (a) Perform a Raster Merge on the four satellite images of FAS_China3.tiff, FAS_China4.tiff, FAS_China5.tiff and FAS_China6.tiff. (b) Perform a Raster Extract covering the areas of the Taiwan Strait and Taiwan Island. (c) Use the vector data for the boundaries of Taiwan's cities and counties. (d) Display air pollution data for Oct and Nov (2012?), using Pseudocolor; Spectral (Blue to Red). (e) Perform Raster Calculator to display the change of pollutants between those two months. (f) Suggest some parts of Taiwan that are less hazardous to stay/live during those bad air quality days. ANSWER - PART (a) Perform a Raster Merge on the four satellite images of FAS_China3.tiff, FAS_China4.tiff, FAS_China5.tiff and FAS_China6.tiff. Step: After loading in the 4 satellite images (FAS_China3.tiff, FAS_China4.tiff, FAS_China5.tiff and FAS_China6.tiff), then used the function "Merge" under ...

 

 

 

STHT 506 -  G EOGRAPHIC INFORMATION SYSTEMS Homework Assignment#3 (Final Submission) Requirement:  (a) Use the Tainan City Madou District vector layers: district & population, roads, and grocery stores. Identify which road sections are candidate for grocery store expansion in the populous villages (say, population >= 2500 inhabitants) in Madou District. (b) Explore the use of QuickOSM plugin and evaluate its usefulness in your GIS project (explanation within 250 words). PART A - ANSWER Step1: Loaded in the data of Tainan City Madou District, and added the label of village names for identification. Step 2: Selected villages with population over 2,500pax by using the function of "Select Features by Expression", highlighted in yellow were the villages selected. Step 3: Selected Grocery Stores located in the village with population over 2500pax, by using the function of "Select by Location", then 6 stores were found from the list. Step4: Used the "Buffer...