Remember that contours cannot normally cross or even touch (they NOTE: Each contour must be a polygon so it canĬontain shading!!! If it touches the side of the box, draw a lineĪlong the box to the other end of the line to close the polygon. Recall our discussion ofĬontouring in class. You can draw contours on the print to figure out where they should be, then draw them on screen with your drawing as a guide.ĭraw your isolines (contours) as discussed in class. Tip: You might find it easier to plan your contours if you print the file In this case you should use the same thicker line for the Provincial borders etc.) To help keep the two types of line (background mapĪnd isolines) separate, the background map is drawn very thin and the isolines temperature isolines over a background of lakes, Sometimes in an isoline map we will specify that the isolines be drawn NOTE: Usually in our maps the internal box and the isolines will be This internal box will contain nothing but the isoline map. This will exactly duplicate the internal box from the map you draw in the previous lab (in fact you can copy and paste it.) Start by drawing a new internal box to contain the isoline map itself. The dots are the actual points at which the measurementsĬreate the new layer you will draw contours in, if you have not done so already. The valuesĬan be measurements other than elevation - e.g. Example of spot height (or point data) file. Work in a new layer it will be more difficult to get rid of theīackground point data map, and impossible to separate the contours from everything else.įigure 1. Draw them in another NEW LAYER above the layer with the pointĭata. Your job is to draw isolines among the points. In nature to the real ones for this data. These values are fictitious, but designed to be similar This new image consists of dots with numbers (similar to the picture below). Adjust the size and position of the point data map to match up the coastline on the new scan to the coast on your map. select all the polygons and make them transparent. This is easiest if you remove all the shading from the earlier map. Adjust its size to fit exactly under your map from Lab 1. Import the contour point data file in your new layer. Lock the other layers, maybe hide them temporarily so they are not a distraction. Make a NEW LAYER underneath everything in your old map. If you didn't do this before, delete the scanned image that you traced from 'File - save as' and save this file as 'Lab 4'. It's a good idea, right now before you have an accident with it, to go to We are going to add a contour layer to that existing base map. Start Inkscape, and open your file for Drawing Lab 1. Save it as you did the scanned map in Drawing Lab 1. (it's at the bottom of this page), and save it to the computer hard drive or your disk or drive. First, read quickly through all the instructions on how to do this week's lab, then start again at the beginning and do the lab itself.įirst, find the point data map we will use in this lab This job is split over two parts, spread over two weeks. Now we will draw some contours (isolines) over our base map from the first map drawing lab. 4: Contour drawing exercise (1) Map Drawing Lab.
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