Codata Explorer

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commercial real estate professionals

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To know the commercial offer present in a Geometry

Geometry – Isochrone – Definitions

“A Geometry is a set of geometric data describing the shape and position of geographical data. The geometric data are represented by points, lines or surface areas and identified in the selected system, thus superimposable with the other data. All geometries occupy a position in space, defined by their interiors, boundaries and exteriors. The exterior of a geometry is the whole space not occupied by the geometry. The interior is the space occupied by the geometry. The boundary of a geometry is the location between its interior and its exterior.”

“An isochrone is a curve that connects the accessible points in a given travel time, from a starting point and using a chosen means of transportation.”

An isochrone is therefore one type of geometry among others.

The most frequently used geometries are:

  • Isochrones,
  • Free contours (freehand tracing),
  • Polygons of all kinds,
  • Circles,
  • Administrative boundaries such as municipalities, departments, provinces, regions, etc.
  • Results of spatial operations : unions, differences, intersections.

All these geometries can be used as a search criterion to find within its perimeter:

  • Locations,
  • Sites,
  • Projects,
  • present Retailers,
  • absent Retailers.

To know the commercial offer present in a Geometry of the “freehand contour” type.

Under the « Draw and search » section, choose a geometry to draw.

To illustrate this feature, let’s take the example of a freehand contour that includes the clusters of Lille, Lille : Gambetta, Lille-Sud, Lambersart, Lomme : ZA du Grand Brut, Englos : Les Géants.

  • First step: Draw the geometry.
    • Connect to the Maps module of Codata Explorer.
    • Under the “Draw and search” section in the right-hand menu, select “Freehand contour”.
    • Choose the color and opacity of your geometry.
    • Place your cursor on the map and while holding down the left mouse button, draw your contour.

  • Step two : Then select the geometry by clicking on it. A window opens.

  • Step three: Select the search for Locations (located in the geometry).

  • Step four : Automatically, the coordinates of the freehand contour are entered in the "Place(s)/Site(s)" criterion of the search Locations.

  • Step five: Identify and target commercial locations occupied by Retailers active in the "Decoration, Small furniture" sector.

  • Step Six: This is the list of locations within the defined freehand contour.

  • You will then be able to:
    • visualize locations on a map (see map below),
    • download the list in PDF or XLS format,
    • visualize the Locations and Retailers index cards,
    • save your search criteria.

To know the commercial offer present in a geometry of the Isochrone type.

To illustrate this feature, let's take the example of a search for commercial locations located 15 minutes by car from the Eurallile shopping centre and active in the « children's wear » sector

  • First step: Draw an isochron.
    • Connect to the Maps module of Codata Explorer.
    • Select the "Isochrone" tool in the right menu.
    • Click on "Select a point" and click on a choosen point on the map (main entrance to the Euralille shopping centre).
    • Set the travel time, means of transport and colour (15 minutes by car, in red).
    • Click on "Draw the isochrone". You will start the calculation and the isochrone will be displayed on the map.


Isochrone connecting the points accessible in 15 minutes by car from the entrance of the Euralille shopping centre in Lille (FR)

  • Step two: Select the isochrone by clicking on it. A window opens.

  • Step three: Select the search for Locations (located in the isochrone).

  • Step four : Automatically, the coordinates of the isochrone are entered in the "Place(s)/Site(s)" criterion of the search Locations.

  • Step five: Identify and target commercial locations occupied by Retailers active in the "children's wear" sector.

  • Step Six: This is the list of locations within the defined isochrone.

  • You will then be able to:
    • visualize locations on a map (see map below),
    • download the list in PDF or XLS format,
    • visualize the Locations and Retailers index cards,
    • save your search criteria.

To know the commercial offer of a geometry of the intersection, addition or difference type of several geometries

Through the mapping tools, it is also possible to know the commercial offer present in an intersection, addition or difference of two polygons, whether they are geometries and/or isochrones.

To illustrate this feature, let's take the example of two polygons. On the one hand, an Isochrone connecting the points accessible in 20 minutes by car from the entrance of the Mérignac Soleil (Carrefour) shopping centre and, on the other hand, a circle drawn from the entrance of the Grand'Tour (E.Leclerc) shopping centre, both located in the urban unit of Bordeaux (FR).

  • First step: Draw the two polygons.

  • Step two: Click on the Intersection / Union / Difference tool located in the “Spatial operations” section

  • Step three: Click on the first polygon and then on the second one (a green "v" surrounded by a circle appears next to the polygons selected in the right menu). Then choose the type of spatial operation (in this case “Intersection”), the color and the opacity percentage of the geometry that will represent the intersection between the two polygons (in this case, red and 40%). Then click on “Draw the result”.

  • Step four: Select the intersection bewteen the two polygons. A window opens.

  • Step five: Select the Sites research(located in the intersection).

  • Step six: Automatically, the coordinates of the geometry representing the intersection are entered in the "Place(s)/Site(s)" criterion of the Locations search engine.

  • Step seven: Define and target Sites such as “Shopping centres” to obtain competing sites located in the intersection of the two polygons previously drawn.

  • Step eight: Here is the list of Sites such as “Shopping centres” located within the intersection.

  • You will then be able to:
    • visualize Sites on a map (see map below),
    • download the list in PDF or XLS format,
    • visualize the Sites index cards,
    • save your search criteria,
    • search from this list of Sites (Locations, Sites, Projects, absent/present Retailers).

Measure, save or delete a geometry.

Any geometry, whatever it is (arrow, line, free contour, circle, isochrone, etc.) can be measured, saved or deleted (except for the custom text which can only be saved or deleted).

By selecting a geometry drawn in the map interface, a window opens. The different options are located at the bottom right of this window.

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