ASSIGNMENT #1

This assignment is a small "mid-term" sanity check of your progress.

It is due by Monday Nov. 18 2019 - please upload in the link Assignment 1 hand-in 

For those without laptops we can organize extra-time (OpenLab)  in the computer room wednesday 6 November from 11 to 18 - please send me an email if you want to organize that. The computer room is booked for this so I just need to know how many people are interested. 

• Styling raster and vector datasets loaded in QGIS
• Deal with different CRS
• Load point data from Text Files
• Sample raster values at points

1. Download one or more Digital Elevation Model (DEM) tiles from SRTM 1-arcsecond products from anywhere in the world using the steps related to the chapter "USGS: EarthExplorer" in the handout - access geodata - v.2019_Oct19
2. Load the raster tile in QGIS and style it with hillshade + color scale like in the first lecture - check tutorial Basic Raster Styling and Analysis (QGIS3)
   
3. Load Google Earth Satellite Imagery using the QuickServices Plugin (if you do not remember how - check the chapter "TMS services" in the handout - access geodata - v.2019_Oct19
   
4. Create your own table with 4 columns; ID, LAT, LON, water-table depth - you can use MS Excel , notepad, notepad++ or any other editor. PS water-depth is related to hypothetical water-table depth for your field (check https://water.usgs.gov/edu/graphics/wcgwstoragewell.gif )
   
5. Add from 5 to 10 points, roughly around a 500x500 meter area, manually to the table with values that you decide (of course Latitude and longitude must be from the area - setup your QGIS view to show you latitude and longitude by project CRS settings as shown in handout handout CRS coordinate reference systems)
   
6. import the points in QGIS (they should be overlapping your area if your LAT LON values were correctly determined in point 5)
   
7. Provide a colorscale from white to red according to water-table depth values
   
8. Digitize a polygon over the points simulating your area of interest (e.g. your study area)
9. Apply a transparent fill to the polygon and a thick red border 
10. Find the average height above sea level of your POINTS --> Sampling Raster Data using Points or Polygons (QGIS3)
11. Calculate distance of water-table to sea level (height of ground from point 10 minus depth of water-table e.g. if your point is 100 m a.s.l and your water table has depth = 10 m than 100 - 10 = 90 - use the field calculator to create a new column.( see https://docs.qgis.org/3.4/en/docs/user_manual/working_with_vector/field_calculator.html info on field calculator)
    
12. Hand in (Assignment 1 hand-in  ) a PDF map with TWO or more representations:
•   your area, with points labelled with water-table depth and background of Google Satellite (see example in image at bottom of this page)
  
•  your area with   points labelled with water-table distance from sea level and Digital Elevation Model (DEM)  raster as background.

For a tutorial on how to make maps follow the link Making a Map (QGIS3)

Below an example of how it could look - do your best, it does not have to be exactly the same but close (PS for adding "m" to the labels you have to create a concatenation of the label value with the string ' m' in the label options. We will see that in class, you do not have to have it in your map)