Hospital Site Suitability Selection using QGIS - Revision history

SamH: /* Data */

2019-10-04T02:40:05Z

Data

2019-10-03T23:38:51Z

Merging Shapefiles

2019-10-03T23:35:57Z

Merging Shapefiles

2019-10-03T23:32:18Z

Extracting Residential Areas from the Zoning Districts

2019-10-03T23:28:11Z

Importing Data

2019-10-03T23:27:46Z

Importing Data

2019-10-03T23:25:49Z

Importing Data

2019-10-03T23:19:51Z

Setting Up the Environment

2019-10-03T23:16:16Z

Tutorial

2019-10-03T23:14:27Z

Data

@@ Line 38: / Line 38: @@
 [[File:Extract_All.jpg]]
-Once you have downloaded the files, you will need to extract the zip files in you DATA folder.
+Once you have downloaded the files, you will need to extract the zipped files in your DATA folder.
 Now only one more file is needed, which will contain the location of all of the existing hospitals in Vancouver. Because there is not file for this in the Vancouver Data Catalogue, we will use Google Earth to find all hospital locations in Vancouver, then export them as a KMZ file. To do this, open Google Earth and search for "hospitals in Vancouver, BC".

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 === Merging Shapefiles ===
-[[File:Merge_Streets.jpg|Merge_Streets.jpg]] Merging street files
+[[File:Merge_Streets.jpg|caption]] Merging street files
+[[File:Merge_rail.jpg|caption]] Merging rail files
 Because we want to perform operations on ''all'' of the street shapefiles and ''all'' of the railway shapefiles, we need to merge them. To do this, click '''Vector > Data Management Tools > Merge Vector Layers'''. For ''Input files'' select all of the files to be merged. Under the ''Merged'' field select ''Save to file'' and save it into your "Data" folder. Uncheck the box for '''Open output file after running algorithm''' then click '''Run in Background'''. Once the operation is completed use the "Browser" panel to add your new file to the data frame (if you don't see it hit the refresh button at the top). Follow these steps to merge all the road shapefiles (lanes, non_city_streets, one_way_streets and public_streets), then all the railway shapefiles (railways and rapid_transit).

@@ Line 101: / Line 101: @@
 === Merging Shapefiles ===
+[[File:Merge_Streets.jpg|Merge_Streets.jpg]] Merging street files
 Because we want to perform operations on ''all'' of the street shapefiles and ''all'' of the railway shapefiles, we need to merge them. To do this, click '''Vector > Data Management Tools > Merge Vector Layers'''. For ''Input files'' select all of the files to be merged. Under the ''Merged'' field select ''Save to file'' and save it into your "Data" folder. Uncheck the box for '''Open output file after running algorithm''' then click '''Run in Background'''. Once the operation is completed use the "Browser" panel to add your new file to the data frame (if you don't see it hit the refresh button at the top). Follow these steps to merge all the road shapefiles (lanes, non_city_streets, one_way_streets and public_streets), then all the railway shapefiles (railways and rapid_transit).

@@ Line 86: / Line 86: @@
 === Extracting Residential Areas from the Zoning Districts ===
+[[File:Select_Features.jpg]]
 One of our criteria for hospital site selection is that the location must be within a certain distance of residential areas, so we need to extract all the residential areas from the zoning districts shapefile. To do this, right-click on the zoning_districts layer and select '''Open Attribute Table'''. The attribute table for the zoning districts will open, and the zoning category for each feature will be shown in the "CATEGORY" column. We want to select all features with categories that contain the word "Dwelling", as this denotes that it is residential. To do this, select '''Select Features Using an Expression''' from the top toolbar. A '''Select By Expression''' window will appear, and for the expression type:
  "CATEGORY" LIKE '%Dwelling%'

@@ Line 74: / Line 74: @@
 [[File:BeforeReorder.jpg|caption]] Before reordering
-[[File:BeforeReorder.jpg|caption]] After reordering
+[[File:Reorder.jpg|caption]] After reordering
 Now, reorder the layers by dragging them in the "Layers" panel so that as many as possible are visible. You can also change the color and symbols for the layers by clicking them and changing the setting in the "Layer Styling" panel on the right (if this is not visible for you, right click the top toolbar and click '''Layer Styling Panel''').You’ll notice that some of the points in the hospital file you created don’t lie within Vancouver's boundaries; this is not a problem as later on in this tutorial the non-valid points will be dissolved. Once you have all the required data imported and looking acceptable, you can move on to the next step.

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 === Importing Data ===
 To import the required data into QGIS, you will use the Browser panel on the left of the screen. Expand the "Project Home" section and you will see all the files you downloaded. Click the files you wish to import to select them (you can select multiple by holding the "Ctrl" key), then drag them into the center of the screen. All your files will now be added to the data frame. If you do not see anything, right click on one of the layers in the "Layers" panel, and select '''Zoom to Layer'''. You should have all the same layers as those seen in the screenshot below.
+[[File:BeforeReorder.jpg|caption]] Before reordering
 Now, reorder the layers by dragging them in the "Layers" panel so that as many as possible are visible. You can also change the color and symbols for the layers by clicking them and changing the setting in the "Layer Styling" panel on the right (if this is not visible for you, right click the top toolbar and click '''Layer Styling Panel''').You’ll notice that some of the points in the hospital file you created don’t lie within Vancouver's boundaries; this is not a problem as later on in this tutorial the non-valid points will be dissolved. Once you have all the required data imported and looking acceptable, you can move on to the next step.

← Older revision		Revision as of 23:19, 3 October 2019
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	[[File:~~Capture1.PNG\|450px\|thumb\|none\|Setting~~ Projection ~~to NAD83(CSRS) / UTM zone 10N~~]]		[[File:Projection.jpg]]

	=== Importing Data ===		=== Importing Data ===

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 == Tutorial ==
+[[File:NewProject.jpg]]
 Now that you have downloaded the software and collected the required data, it is time to begin. Open QGIS, click the '''New Project''' button (white piece of paper) in the top left to start a new project. Save the project file into your working folder under whatever name you choose (try not to use spaces or funny characters in your file name).
 === Setting Up the Environment ===

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 [[File:Copytomyplaces.png|450px|thumb|none|Click the highlighted folder icon to move the search results into your My Places folder]]
+[[File:MyPlaces6.jpg]]
 Now right click on the folder containing your search results and select '''Save Place As... '''