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Help to use geovisualisation platform

1) Preliminary notes

Data which are used in the Mobislicope come from Origin-Destination surveys (from 2009 to 2018).

Only trips occurring weekdays (Monday-Friday) have been considered.

Number and proportion of present population by district and hour have been estimated from survey data. They are therefore subject to a statistical margin of error.

2) Select a map

In the left-hand menu, you can choose one indicator and the map representation, eitheir as aof the total population, or in numberor in flows

accordeonmenu-en

To get informations about indicators and their composing groups, click Q button on the right side.


With flows maps you get number of non resident people at district level. With links (on mouseover), you can know their district of residence.
oursins

3) Map at different times of the day

At the top of the screen, click play buton in the timeline to scroll through the hours.

timeline

4) Explore one specific district

Select one district by clicking on the map and have a look on the chart at the lower right corner of your screen.

select-secteur

With this chart, you can follow daily evolution of selected indicator in the selected district.

graph-simple

By clicling on "stacked" mode, you can see all groups of selected indicators.

graph-empile

Colors on maps and charts have the same color code than the lef-hand indicator menu. In the above picture, public transportation are in blue, private motor vehicule are in pink and soft mobility in green.

5) Explore spatial segregation

Ar the top right corner, the chart give information about daily evolution of spatial distribution of people in the whole region for the selected indictaors.

select-secteur

To get informations about the two available indexes (Duncan et Moran), click Q button on the right side.

6) Explore another city region

22 french city regions are included in the actual version of the Mobiliscope(2019). To access another city region, use magnify tool

To go further

By reading methods pages, you can get more information about geovisualition platform, indicators and data which are currently used in the Mobiliscope.

Enjoy !

Data

There are 22 french city regions in the actual version of the Mobiliscope (2019).

Origin-destination surveys

Data came from 22 large 'Origin-Destination' surveys (Enquêtes Ménages-Déplacements - EMD / Enquête Globale Transport - EGT ; CEREMA), available from ADISP (National Archive of Data from Official Statistics in France).
In 'Origin-Destination' surveys, every trip made on the day before the survey was reported by respondents. Following variables were available for each trip: precise localization of place of departure and place of arrival, time of departure and time of arrival (with exact minutes), trip purpose and mode of transportation used.The trip dataset was transformed into a location dataset in which:

  • Every location was defined at district level (ie. the smallest unit in which it is relevant to aggregate data due to survey design);
  • 24 hourly time steps were defined to get 24 cross-sectional pictures of respondents' locations;
  • Transportation periods were removed, except if respondents have reported to use an 'adherent' mode of transportation (ie. walking or cycling). In this case, half of the trip was considered as located in the district of origin and the other half as located in the district of destination.

More methodological details can be found in the paper Social segregation around the clock in the Paris region.

Studied population

Only respondents aged 16 years and over (sufficiently autonomous in their daily mobility) have been selected.
Only trips occurring weekdays (Monday-Friday) are considered.
Number and proportion of present population by district and hour have been estimated from survey data. They are therefore subject to a statistical margin of error.
Every measure published in the Mobiliscope has been estimated hourly (from 4:00 am to 3:00 am) taking into account weighting coefficients.

  • In the Paris Region (EGT, 2010), weighting coefficients have been computed at household and individual levels to grant every district with the same distribution in household profile (size and housing type) and population profile (age, sex, occupation, and socioprofessional group) as the distribution observed in the 2008 French census.
  • In the other french cities region, weighting coefficients have been computed at household and individual levels to grant every district with the same distribution in household sizes and age groups as the distribution observed in French census.

Districts

Cities have been subdivided into districts (called 'secteurs' in french 'Origin-Destination' surveys). Districts are the primary sampling units in these survey. They correspond to groups of municipalities (or arrondissements in Paris, Lyon and Marseille). Their population size varies according to studied cities. Same number of inhabitants have been surveyed in every district. The Mobiliscope only displays the name of the three more populated municipalities in every district.
Districts are smaller in inner cities and larger in the peripheral areas.


Detailed informations about 'Origin-destination' survey for every city

Sample size city by city
City Year Number of respondents aged 16 or over Number of weekdays trips Number of locations Number of districts District size in km². Median area (min-max) Number of respondents per district. Median (min-max) at 3am Number of respondents per district. Median (min-max) at 3pm
Albi region 2011 2,339 9,171 10,518 15 7 (1.3-54) 155 (148-160) 122 (80-282)
Angers region 2012 3,983 18,399 18,908 28 17 (2-110) 139 (125-160) 105 (65-272)
Angoulême region 2012 2,684 11,300 12,463 18 14 (1.5-151) 146 (139-172) 129 (71-257)
Béziers region 2014 4,212 18,661 19,719 30 52 (1.2-822) 138 (130-153) 120 (78-196)
Bordeaux region 2009 10,677 48,462 52,014 76 5 (0.4-203) 140 (124-156) 116 (65-268)
Caen region 2011 10,000 43,194 48,466 67 15 (0.5-647) 151 (125-165) 121 (72-475)
Clermont-ferrand region 2012 8,051 34,182 37,638 56 39 (0.7-471) 144 (131-158) 110 (75-359)
Grenoble region 2010 13,834 63,336 67,131 97 14 (0.2-834) 139 (124-273) 106 (53-463)
La Rochelle region 2011 2,902 12,203 13,847 19 8 (1.3-40) 153 (137-166) 121 (75-408)
Lille region 2016 7,950 38,180 39,031 57 5 (1-56) 138 (123-154) 118 (72-300)
Lyon region 2015 24,071 99,585 107,666 169 10 (0.4-346) 140 (121-252) 122 (71-462)
Marseille region 2009 19,380 87,031 93,970 137 18 (0.3-342) 141 (117-162) 120 (68-390)
Montpellier region 2014 11,433 52,387 55,662 80 10 (0.3-547) 140 (125-240) 116 (72-399)
Nancy region 2013 9,657 40,664 43,563 68 19 (0.6-407) 142 (124-160) 108 (60-539)
Nantes region 2015 17,358 81,924 85,372 123 21 (0.6-331) 139 (113-195) 117 (71-370)
Paris region 2010 26,180 124,262 130,802 109 26 (3-1,324) 232 (23-416) 196 (77-730)
Quimper region 2013 4,696 17,291 20,382 30 57 (2.5-260) 152 (142-201) 128 (100-266)
Rennes region 2018 9,317 44,004 45,964 68 39 (0.8-466) 136 (118-157) 106 (61-367)
Saint-Étienne region 2010 8,525 38,576 40,284 52 31 (1.2-345) 156 (137-220) 128 (75-339)
Strasbourg region 2009 10,052 46,935 48,815 67 35 (0.6-581) 145 (128-224) 127 (70-271)
Toulouse region 2013 11,136 48,919 53,431 66 11 (0.9-237) 155 (128-330) 124,5 (64-512)
Valenciennes region 2010 5,718 23,313 23,775 41 12 (0.9-51) 139 (119-159) 118 (75-275)