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July 2007 - creating territories that respond to different types of constraints

Our geographers/consultants are solicited on a regular basis about creating territories that respond to different types of constraints. Lately, innovating answers came up and we naturally thought you would like to know more about them.

We combined module of C&D 5.0 to build territories taking into account a certain number of impositions, such as distance and potential.

The tool below will allow you to evaluate the potential next to your agencies, subsidiaries, partners or sales teams. In this example, we are looking to evaluate the potential of the 26-50 year-olds in a 10 km perimeter around Tours and Loches (France).

The "Poles Selection" module enables the choosing of the places where are settled, for example, the agencies. The module "Qualitative Symbol" allows locating them.

The first modules of "Minimum Distance Calculation" and "Filter" (with a base map in output) are there to specify the distance constraint (10 km in this example).

In a second phase, the second module of "Minimum Distance Calculation", the second "Filter" (formula: a=a_max) and the module "Value" allow to display the distance between the selected pole(s) and its farthest point. That way, we can use the distance constraints and determine a limit customizable at will.

  • The modules "Surface" and "Calculation" that follow the pole selection allow giving every time the same weight to each point
  • The Polarization (with a qualitative data in output) allows giving every municipality the same quality, given that they are less than 10 km away from the pole
  • Doing this, the module "Fusion" creates a single area on which it is possible to make a sum of the data on the level of the municipality, like the number of 26-50 years-olds ("Aggregation").

All these operations are made on municipalities situated less than 10 km away from the pole. When a municipality is located astride several proximity areas, they are assigned to the nearest pole (as the weights of the polarization are equivalent, only the distance can make the difference).

At last,

  1. you can display the "value" of the "aggregation" and then modify the constraint on distance (in the first "filter") for it to be more alike the potential threshold first attributed or,
  2. - you can compare the potentials on equidistant areas as in our example

You can easily reproduce this example using the data sets provided with the software. The base map we used is Indre et Loire by municipalities, the data set "26-50" is a text file named "IndreEtLoire_population99_tranchesAges.txt".

Should you have any comment or suggestion about this tip, please contact the technical support by mail (support@articque.com) or by phone (+33 2 47 49 63 21 between 2:00 pm and 6:00 pm from Monday till Thursday, and from 2:00 pm to 5:00 pm on Fridays - CET time)

April 2007 - The page setup of the maps with C&D
C&D 5.0 "Page setup" function offers many possibilities to move, remove, copy/cut/paste and change properties of every elements on your map before saving it as an image file.

To realize these operations, you first need to understand the different ways to select your map's objects on the "Page setup" window.

Four different selection tools are available in the toolbar on the top of the Page setup window.

The "individual selection" button allows you to choose graphical objects by using the "Control" key on your keyboard and clicking on each object you want to select.

The "rectangular selection" button can help you selecting items by drawing a rectangle around the objects.

The "circular selection" button can help you selecting items by drawing a circle around the objects.

The "free hand selection" button allows you to draw a free area around the objects you want to select.

April 2007 - Export your maps in HTML format with C&D
HTML export of C&D 5.0 allows you to use your map as a PNG file fixed in a HTML page with a "mapping".

"Mapping" is a system of invisible reactive areas drawn in your HTML page over the cities, provinces, territories, etc. of your map. It displays the names and identifiers of your map's objects as a label text when the mouse is over them (1). Hypertext links are pre-programmed on these areas, and they lead to specific page for the clicked area.

Label text displaying is made using JavaScript in the source code of your HTML page generated by C&D 5.0.

However, if this JavaScript code is accepted by Internet Explorer 7, it can't be recognized by Mozilla FireFox. To make this label text function working under Mozilla FireFox, you need to replace a part of the source code after the <head> and between the <!-- and //--> tags of your HTML page by :

var isNav=(navigator.appName.indexOf('Mozilla')!=-1); var isWin=(navigator.platform.indexOf('Win')!=-1); var xpos,ypos; window.onload = init; function init() {if (window.Event) {document.captureEvents(Event.MOUSEMOVE);}document.onmousemove = getXY;} function getXY(e) {xpos = (window.Event) ? e.pageX : event.clientX;ypos = (window.Event) ? e.pageY : event.clientY;} function show_hide_layer(command) {var obj;if (!isNav) obj=idlayer; else obj=document.idlayer; if (obj!=null) { if (obj.style) { obj=obj.style; command=(command=='show')?'visible':(command='hide')?'hidden':command; } if (isWin || isNav) { obj.left=xpos+30; obj.top=ypos-30; } obj.visibility=command; } } function showid(value) { var obj; htmlval="<table>"+"<tr><td>"+value+"</td></tr></table>"; if (isNav) obj=document.idlayer; else obj=idlayer; if (obj!=null) { if (isNav) { obj.document.write(htmlval); obj.document.close(); } else obj.innerHTML=htmlval; } show_hide_layer('show');}

Save your modified HTML page and re-open it with Mozilla FireFox to see your label texts displayed.

May 2005 - Store maps realized with C&D
Do you know that with Cartes & Données you can export your merged maps thanks to the button "floppy disc-globe" of the "Fusion" window, or the "Union" window ? So you can customize your working maps base.

May 2005 - Recover the identifiers of a working map
How to recover the identifier codes from a working map ? Link an empty Data module to your working map and export the identifiers column by clicking the "floppy disc-data" button of the maps window.

May 2005 - Store the charts of the statistical modules
In the Quantification, Linear regression and PCA modules, you can store your charts to better analyze the evolution of your parameters.

May 2005 - Create a map with an identifier code and a name using the Fusion module
How to create a map with an identifier code and a name using the Fusion module ? Your qualitative data dedicated to the fusion must be drawn up like this : code-name. Then save the merged map in Num format using C&D Num and save it again in ".vxf" format. Consequently your map has a distinct code and name.

15 jan 2004 - Custom libraries
Cartes & Données provides by default 3 modules windows : the Sources, Operators and Displayers « libraries ». They contain modules which are parameterized by default.
It is possible to create custom libraries, in order to save modules pre-parameterized according to your choices. For example, you can store in these libraries some displayers modules using your own color palettes, some Displaying modules with predefined fonts, some Filters/Operations modules already parameterized, some predefined SQL requests (for the ODBC sources), and so on...

To create a custom library, you just have to use the command "File / New Library" (Ctrl+L). Then, your custom library appears as a diagram except its hatching background. You can move there the modules you want to save using the mouse (right button on Windows or Apple+click on MAC).

You can save your custom libraries in the ".cd" format as for the diagrams. You can open them while using C&D by the command "File / Open" (Ctrl+O).

12 nov 2003 - How to disable the process to modify more than one module ?
If you work on a big map and want to modify parameters in some modules before running the process, you just have to disconnect the icons from the ones which follow before changing the parameters.

02 sept 2003 - Show a circle around a city in C&D
In the example below, we make a circle of radius 20 km around "Lyon".

How to build that map:
  • Choose the wanted map in the "Map" module in the diagram (ex: 69.vxf, Rhône by communes).
  • Link a "Data" module to the "Map" module, and set any value in C&D data sheet for the commune from which you want to measure the distance. In this example, we have set "1" as data for the Lyon commune.

  • Then link this module "Data" to a "Symbols" module, and click on it to open its "parameters" window.
    • "Maximum size" represents the circle radius in map unit. You can modify this value to set a particular size to your circle by unchecking the "Automatic size" box. All the map supplied by articque are in kilometers unit, so we have set the maximum size to 40 km (diameter) to have a circle with 20 km radius around Lyon.
    • You can then remove or modify the filling of the circle to improve the final aspect of your map. Here we have choosen a diagonal hatching to preserve the visibility of communes which are in the circle and to increase the visual impact of the circle.

  • You can improve the visual aspect of your final map by adding a "Values" module to show the name of the Lyon commune and another "Symbols" module to show a small black point on the commune. Here is the diagram which corresponds to the final map:

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