Highly Effective Construction of Thematic Maps - Revision history

Erci at 15:51, 4 October 2020

2020-10-04T15:51:15Z

Erci at 15:47, 4 October 2020

2020-10-04T15:47:08Z

Erci at 15:02, 4 October 2020

2020-10-04T15:02:17Z

Erci: /* Manipulating the data */

2020-10-04T14:26:41Z

Manipulating the data

Erci: /* Styled Layer Descriptor */

2020-10-04T13:50:20Z

Styled Layer Descriptor

Erci: /* Starting OpenJUMP and importing data */

2020-10-04T13:10:54Z

Starting OpenJUMP and importing data

Erci: /* Introduction */

2020-10-04T12:53:23Z

Introduction

DidierS: /* Conclusion */

2019-10-04T03:47:25Z

Conclusion

DidierS: /* Styled Layer Descriptor */

2019-10-04T03:47:13Z

Styled Layer Descriptor

DidierS: /* Styled Layer Descriptor */

2019-10-04T03:46:34Z

Styled Layer Descriptor

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 ===Why use OpenJUMP?===
-The feature that really sets it apart from other programs is that the main focus of its tools and functionality leans more towards style through the ease of editing geometry and attribute data. Additionally, its friendly layout results with a rapid learning curve.
+The feature that really sets it apart from other programs is that the main focus of its tools and functionality leans more towards style through the ease of editing geometry and attribute data. Additionally, its friendly layout results in a rapid learning curve.
 ===Purpose===
-This tutorial will demonstrate the construction of a common thematic map displaying the land use throughout Ottawa in OpenJUMP (such as the one shown in Figure 1.1). In contrast to reference maps which focuses on physical features, a thematic map has the main goal of displaying a particular theme in an area. These maps can be seen as an infographic that communicates information to the viewer. Some examples of thematic maps include [http://wiki.gis.com/wiki/index.php/Choropleth_map choropleth maps], [http://wiki.gis.com/wiki/index.php/Dot_density_map dot density maps], and [http://wiki.gis.com/wiki/index.php/Proportional_symbol_map proportional symbol maps]. As seen in this exercise, their production in GIS software requires stacking multiple data layers together and then modifying the map’s appearance in order to enhance the visualization of the thematic data. Throughout this process, the user will determine various potentials linked to this software through editing the attributes and symbology of the provided data. Furthermore, it will help become more familiar with this user-friendly open source GIS.
+This tutorial will demonstrate the construction of a common thematic map displaying the land use throughout Ottawa in OpenJUMP (such as the one shown in Figure 1.1). In contrast to reference maps which focus on physical features, a thematic map has the main goal of displaying a particular theme in an area. These maps can be seen as an infographic that communicates information to the viewer. Some examples of thematic maps include [http://wiki.gis.com/wiki/index.php/Choropleth_map choropleth maps], [http://wiki.gis.com/wiki/index.php/Dot_density_map dot density maps], and [http://wiki.gis.com/wiki/index.php/Proportional_symbol_map proportional symbol maps]. As seen in this exercise, their production in GIS software requires stacking multiple data layers together and then modifying the map’s appearance in order to enhance the visualization of the thematic data. Throughout this process, the user will determine various potentials linked to this software through editing the attributes and symbology of the provided data. Furthermore, it will help become more familiar with this user-friendly open source GIS.

@@ Line 1: / Line 1: @@
-'''OpenJUMP Tutorial by Thomas Brown - Revised by Didier Soeharjono'''
+'''OpenJUMP Tutorial by Thomas Brown - Revised by Didier Soeharjono and Erika Cizek'''
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 <br>
 In order to show the viewer which area the inset map is showing, we must indicate the extent of the inset. In the Items panel on the right side of the layout view, click on Map 1 (the overview of Ottawa). Click on the <u>'Item Properties'</u> tab below, and scroll down to Overviews. There, click on the green plus sign, and select Map 2 in the Map frame field. A red rectangle should appear on your main map, showing the extent of your inset. From here you can add any map elements that you deem fit, including a title, north arrow, legend, or scale bar. You can do this by clicking on <u>'Add Item'</u> at the top of the layout viewer and selecting the map elements of your choice.
+<center>[[Image:Finallayout.jpg|700px]]</center>
+<center>''Figure 1.8 The final thematic map including the inset map.''</center>
 =='''Conclusion'''==

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 <center>''Figure 1.7 In some versions of OpenJUMP the option to export SLD file is actually shown as "Export style".''</center>
+=='''Adding an Inset Map'''==
+Inset maps are often used in thematic mapping in order to show a more dense area in greater detail, or to show the location of an area in a regional or global context. With the land use in Ottawa, an inset map is very useful in showing the more densely fragmented downtown core of the city in greater detail. Here is how you go about making one in QGIS using the layers you created in OpenJUMP.
+<u>Step 1: Saving each layer</u>
+<br>
+Save and export each of the combined layers you created by right clicking on each layer and selecting <u>'Save Dataset As'</u>.
+<br>
+<br>
+<u>Step 2: Setting up in QGIS</u>
+<br>
+Open QGIS. In the Browser panel, navigate to your directory, select each layer that you just exported and drag them down to the Layers panel below. You may need to edit the colours for each layer. To do so, right click on the layer and click <u>'Properties'</u>. Then select an appropriate colour in the Color field. Click ok.
+<br>
+<br>
+<u>Step 3: Print Layout</u>
+<br>
+In the toolbar at the top of the window, click on <u>'New Print Layout'</u> [[File:Newprintlayout.jpg]]. Select a name for your print layout. In the toolbar on the left of the window that has just opened, click on <u>'Add a New Map to the Layout'</u> [[File:Addnewmap.jpg]], and click and drag your mouse over the layout viewer to cover the page. Your map should appear.
+<br>
+<br>
+<u>Step 4: Adding your inset</u>
+<br>
+Go back to the original map viewer, and zoom in on the downtown core of Ottawa. Then go back to the layout viewer, and once again click on the <u>'Add a New Map to the Layout'</u> icon. This time, instead of dragging your map across the entire layout, draw your rectangle in a blank corner of your map. The zoomed in section of downtown Ottawa should appear in the inset.
+<br>
+<br>
+<u>Step 5: Indicating extent</u>
+<br>
+In order to show the viewer which area the inset map is showing, we must indicate the extent of the inset. In the Items panel on the right side of the layout view, click on Map 1 (the overview of Ottawa). Click on the <u>'Item Properties'</u> tab below, and scroll down to Overviews. There, click on the green plus sign, and select Map 2 in the Map frame field. A red rectangle should appear on your main map, showing the extent of your inset. From here you can add any map elements that you deem fit, including a title, north arrow, legend, or scale bar. You can do this by clicking on <u>'Add Item'</u> at the top of the layout viewer and selecting the map elements of your choice.
 =='''Conclusion'''==

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 <br>
 By referring to the <b>'LandUse_2010_Legend.xlsx'</b> Microsoft Excel file that comes in the downloaded data folder, we can classify the land use layers into 9 different types. Each layers will be reclassified into the following categories:
-*<b>Residential:</b>R1; R2; R3; R3-3; R4-x; R-4; R-5
+*<b>Residential:</b>R1; R2; R3; R3-S; R4-x; R4; R5
 *<b>Commercial:</b>C1; C2; C3; OF
 *<b>Industrial:</b>M1; M2
@@ Line 121: / Line 121: @@
 *<b>Other:</b>V1; V2
 <br>
-To do so in OpenJUMP, we can select the appropriate layers for each category then right-click and choose the <u>'Combine selected layers'</u> button. This will combine all the selected layers into a single one, which we will then rename the newly created <b>'Combined'</b> layer to the appropriate category name by double-clicking on its label. This process will have to repeated until the 9 reclassified categories have been created and renamed.
+To do so in OpenJUMP, we can select the appropriate layers for each category then right-click and choose the <u>'Combine selected layers'</u> button. This will combine all the selected layers into a single one (located at the bottom of the panel), which we will then rename the newly created <b>'Combined'</b> layer to the appropriate category name by double-clicking on its label. Repeat this process until you have created 9 reclassified and renamed categories. Move the combined category set of layers to the top (so that these layers are visible on the map) by selecting the 'Result' folder and selecting <u>'Move Category to Top'</u>. If you are having issues with the software lagging at this point, you can select the original (uncombined) layers, right click, then click <u>'Remove Selected Layers'</u> to get rid of them (you will only be working with the combined layers from now on).
 <br>
 <br>
 <u>Step 7: Changing the layers style</u>
 <br>
-In order to change the color symbolization of the layers, we will start by selecting each reclassified layers one by one, followed by clicking on the <u>'Change styles'</u> button (painting palette icon). In the pop-up window, click on the <u>'Colour theming'</u> tab and then uncheck the <u>'Enable colour theming'</u> box. Now return back to the <u>'Rendering'</u> tab, before changing the <u>'Fill'</u> to a more appropriate color for each reclassified layer.
+In order to change the color symbolization of the layers, we will start by selecting each reclassified layers one by one, right clicking, hovering over <u>'Styles'</u>, and clicking on the <u>'Change styles'</u> button (painting palette icon). In the pop-up window, click on the <u>'Colour theming'</u> tab and then uncheck the <u>'Enable colour theming'</u> box. Now return back to the <u>'Rendering'</u> tab, before changing the <u>'Fill'</u> to a more appropriate color for each reclassified layer.
 <br>
 <center>[[Image:Changestyle.png|700px|]]</center>

@@ Line 146: / Line 146: @@
 <center>''Figure 1.6 How to navigate to the SLD option.''</center>
+<<center>[[File:Exportstyle img.png|400px]]</center>
+<center>''Figure 1.7 In some versions of OpenJUMP the option to export SLD file is actually shown as "Export style".''</center>
 =='''Conclusion'''==

@@ Line 81: / Line 81: @@
 <u>Step 3: Starting OpenJUMP</u>
 <br>
-OpenJUMP starts up by clicking the [[Image:thumb1.jpg|64px|]] icon, the main screen shown in Figure 1.2 should appear shortly after.
+OpenJUMP starts up by clicking the [[File:OJ Thumbnail.png]] icon, the main screen shown in Figure 1.2 should appear shortly after.
 <br>
 <br>
@@ Line 94: / Line 94: @@
 <center>''Figure 1.2 shows the starting interface of OpenJUMP and highlights the icon for importing files.''</center>
 <br>
 ===Manipulating the data===
 <u>Step 5: Extracting the data</u>

← Older revision		Revision as of 12:53, 4 October 2020
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	===Purpose===		===Purpose===
	This tutorial will demonstrate the construction of a common thematic map displaying the land use throughout Ottawa in OpenJUMP (such as the one shown in Figure 1.1). In contrast to reference maps which focuses on physical features, a thematic map has the main goal of displaying a particular theme in an area. These maps can be seen as an infographic that communicates information to the viewer. As seen in this exercise, their production in GIS software requires stacking multiple data layers together and then modifying the map’s appearance in order to enhance the visualization of the thematic data. Throughout this process, the user will determine various potentials linked to this software through editing the attributes and symbology of the provided data. Furthermore, it will help become more familiar with this user-friendly open source GIS.		This tutorial will demonstrate the construction of a common thematic map displaying the land use throughout Ottawa in OpenJUMP (such as the one shown in Figure 1.1). In contrast to reference maps which focuses on physical features, a thematic map has the main goal of displaying a particular theme in an area. These maps can be seen as an infographic that communicates information to the viewer. Some examples of thematic maps include [http://wiki.gis.com/wiki/index.php/Choropleth_map choropleth maps], [http://wiki.gis.com/wiki/index.php/Dot_density_map dot density maps], and [http://wiki.gis.com/wiki/index.php/Proportional_symbol_map proportional symbol maps]. As seen in this exercise, their production in GIS software requires stacking multiple data layers together and then modifying the map’s appearance in order to enhance the visualization of the thematic data. Throughout this process, the user will determine various potentials linked to this software through editing the attributes and symbology of the provided data. Furthermore, it will help become more familiar with this user-friendly open source GIS.

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 <center>''Figure 1.5  Final land cover map of Ottawa.''</center>
-==Styled Layer Descriptor==
+=='''Styled Layer Descriptor'''==
 Since shapefiles in general do not store visual elements, once a GIS software is closed and reopened all of those styling elements are deleted. The Styled Layer Descriptors (SLD) option retains style information into a layer, which can be imported and exported in OpenJUMP. These files are not only useful for maintaining style in OpenJUMP since they are written in Extensible Markup Language (XML); they are universally useful for styling webmaps. To build an SLD simply right click on the layer in the table of contents and select Style->Save Style as SLD File (red circle in Figure 1.6). From there the SLD file is stored and can be imported into a layer at any point using the Style->Import SLD File option from the same menu (blue circle in Figure 1.6).