GIS AH C7 - Revision history

Rachel: /* What's next? */

2014-10-31T01:09:24Z

‎What's next?

2014-10-24T03:46:53Z

‎50px Follow along: Start a Project

2014-10-24T03:40:13Z

2014-10-24T03:33:27Z

‎50px Follow along: "On the Fly" Reprojection

2014-10-24T03:22:03Z

‎50px Follow along: Projections

2014-10-17T04:18:25Z

‎50px Try yourself... distance from high schools

2014-10-17T04:17:00Z

‎50px Try yourself... find high schools

2014-10-17T04:15:55Z

‎50px Try yourself... find high schools

2014-10-17T04:11:18Z

‎50px Try yourself... find important roads

2014-10-17T04:08:25Z

‎50px Try yourself... find important roads

@@ Baris 400: / Baris 400: @@
 In the next lesson, we will look at Plugins, and how they can help you with your mapping tasks.
 {{example|Click here to go to [[GIS AH C8|Module 8 : Plugins]]}}
 <references/>

@@ Baris 181: / Baris 181: @@
 * Start a new QGIS project.
 * Start adding new layers. They're all to be found in the <code>exercise_data/projected_data</code> folder.
-* Add the <code>schools_33S</code>, <code>roads_33S</code> and <code>farms_33S</code> layers.
+* Add the ''[[media:schools_33S.zip| <code>schools_33S.shp</code>]]'', ''[[media:roads_33S.zip| <code>roads_33S.shp</code>]]'', and ''[[media:farms_33S.zip| <code>farms_33S.shp</code>]]'' layers.
 These files are in a Projected Coordinate System, which is necessary for this analysis, for reasons we have covered in the previous lesson. (We want to be able to calculate distances in meters and areas in hectares, not in degrees.)

@@ Baris 83: / Baris 83: @@
 Now, because they are made to project in the same CRS, the two datasets fit perfectly:
-[[Image:0028.png|image]]
+[[Image:0028.png|700px]]
 When combining data from different sources, it is important to remember that they might not be in the same CRS. "On the fly" reprojection helps you to display them together.

@@ Baris 59: / Baris 59: @@
 ** Uncheck the ''Enable "on the fly" CRS transformation'' box.
 ** Clicking ''OK''.
-* Add another vector layer to your map which has the data for Indonesia only. You will find it as <code>exercise_data/world/Indonesia_regions_32750.shp</code>.
+* Add another vector layer to your map which has the data for Indonesia only. You will find it as ''[[media:Indonesia_regions_32750.zip| <code>exercise_data/world/Indonesia_regions_32750.shp</code>]]''.
 What do you notice?

@@ Baris 24: / Baris 24: @@
 * Save your current map.
-* Then open the map of the world which you'll find under <code>exercise_data/world/world.qgs</code>.
+* Then open the map of the world which you'll find under ''[[media:world.zip| <code>exercise_data/world/world.qgs</code>]]''.
 * Zoom in to Indonesia by using the ''Zoom In'' tool.
 * Try setting a scale in the ''Scale'' field, which is in the ''Status Bar'' along the bottom of the screen. While over Indonesia, set this value to <code>1:5000000</code> (one to five million).

@@ Baris 309: / Baris 309: @@
 * Use the same approach as above and create a buffer for your schools.
-It needs to be <code>10 km</code> in radius, and saved under the usual directory as <code>high_schools_buffer_10km.shp</code>.
+It needs to be 10 km in radius, and saved under the usual directory as <code>high_schools_buffer_10km.shp</code>.
 === [[Image:basic.png|50px]] Follow along: Overlapping Areas ===

← Revisi sebelumnya		Revisi per 17 Oktober 2014 04.17
Baris 262:		Baris 262:

	* Save the resulting layer under <code>exercise_data/residential_development/</code> as <code>high_schools.shp</code>.		* Save the resulting layer under <code>exercise_data/residential_development/</code> as <code>high_schools.shp</code>.
−
−	~~[[GIS_AH_Answers#Distance_from_High_Schools\|''Check your results'']]~~

	=== [[Image:basic.png\|50px]] Follow along: Analyzing the Problem: Distances From Schools and Roads ===		=== [[Image:basic.png\|50px]] Follow along: Analyzing the Problem: Distances From Schools and Roads ===

@@ Baris 255: / Baris 255: @@
 Your future customers will want to send their children to high schools.
-* Use the same approach as before and build this query for the ''schools'' layer:</p>
+* Use the same approach as before and build this query for the ''schools'' layer:
-<p><code>has_high_s = 'y'</code>
 You should have only 3 out of the 4 original schools left.
 * Save the resulting layer under <code>exercise_data/residential_development/</code> as <code>high_schools.shp</code>.
 === [[Image:basic.png|50px]] Follow along: Analyzing the Problem: Distances From Schools and Roads ===

@@ Baris 243: / Baris 243: @@
 We have a similar problem with the roads; the only roads we're taking into account are the main ones.
-* Build a query for the ''roads'' layer, like you did above for the ''farms'' layer. You want only the types <code>primary</code>, <code>secondary</code>, <code>tertiary</code> and <code>trunk</code>, so you need to build this query:</p>
+<code>TYPE = 'primary' OR TYPE = 'secondary' OR TYPE = 'tertiary' OR TYPE = 'trunk'</code>
 You can either use the approach above, where you double-clicked values and clicked buttons, or you can copy and paste the command above.

← Revisi sebelumnya		Revisi per 17 Oktober 2014 04.08
Baris 248:		Baris 248:

	You can either use the approach above, where you double-clicked values and clicked buttons, or you can copy and paste the command above.		You can either use the approach above, where you double-clicked values and clicked buttons, or you can copy and paste the command above.
		+
		+	[[GIS_AH_Answers#Find_Important_Roads\|''Check your results'']]

	=== [[Image:basic.png\|50px]] Try yourself... find high schools ===		=== [[Image:basic.png\|50px]] Try yourself... find high schools ===