---
title: Create a time-based map with vector data
description: CartoVista allows you to join a data table with time-based records and create time-based analyses of your geographical layer.
---

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# Create a time-based map with vector data

## CartoVista allows you to join a data table with time-based records and create time-based analyses of your geographical layer.

### Create a multiple join

If your data table contains time-based records, with more than one record associated with each geographical feature, you can create a multiple join.

Steps are similar to a [simple join](https://knowledge.cartovista.com/join-a-data-table?hsLang=en), and you just need to define the **Time Series Column** of your data table first, in the **Information** tab your data table's [Detail Panel](https://knowledge.cartovista.com/view-and-edit-data-details?hsLang=en):![time-series-column](https://knowledge.cartovista.com/hs-fs/hubfs/Knowledge%20Base%20Import/time-series-column.png?width=446&name=time-series-column.png)

Select the column that contains the date information of your records. Make sure you set your [column's type to be date-time](https://knowledge.cartovista.com/change-a-field-name-and-data-type?hsLang=en).

You can then link your layer to your data table. The **Link Data window** will indicate the number of records, linked, and the type of join: *1-to-N* indicates that a multiple join was detected. ![one-to-many-join](https://knowledge.cartovista.com/hs-fs/hubfs/Knowledge%20Base%20Import/one-to-many-join.png?width=435&name=one-to-many-join.png)

### Define aggregation type

When added to a map, time-based records will be aggregated in some of your map's tools and panels: the Table View, the Data tip, and the Info Tool.

You can define which aggregation method is to be used for each column of your time-based records. [View the data of your data table](https://knowledge.cartovista.com/change-a-field-name-and-data-type?hsLang=en) and click on a column to access its properties. Select the appropriate aggregation method:![aggregation-type](https://knowledge.cartovista.com/hs-fs/hubfs/Knowledge%20Base%20Import/aggregation-type.png?width=466&name=aggregation-type.png)

Available aggregation methods depend on your column's type.

Aggregation methods for **integer** include the following:

- Sum
- Maximum
- Minimum
- Average

 The aggregation method for **string** is **Count**.

### Add and view your time-based data in your map

You can now create a map and use your joined dataset in any of the interactivity tools. Simply add your time-based columns as any regular column to any [interactivity tool](https://knowledge.cartovista.com/manage-interactivity?hsLang=en).

- **Data tip**: the data tip will show the aggregated values for each feature.
- **Info Tool**: the info tool will show the aggregate and individual values. You will be able to iterate through each sub-feature and see the individual data.![infotool-one-to-many](https://knowledge.cartovista.com/hs-fs/hubfs/Knowledge%20Base%20Import/infotool-one-to-many.png?width=291&name=infotool-one-to-many.png)
- **Tables:** the data table will show the aggregated values

 In the **General** tab of the **Layer Properties**, enable the Date Range Picker if you want your users to be able to filter data based on a certain date and time. ![show-date-time-picker](https://knowledge.cartovista.com/hs-fs/hubfs/Knowledge%20Base%20Import/show-date-time-picker.png?width=688&name=show-date-time-picker.png)

The Date Range Picker will be available as a floating window on your map:![date-range-picker](https://knowledge.cartovista.com/hs-fs/hubfs/Knowledge%20Base%20Import/date-range-picker.png?width=368&name=date-range-picker.png)

In the [Viewer Configurations](https://knowledge.cartovista.com/viewer-configuration-?hsLang=en), enable the **Time View** option if you want your users to get a chart view of your time-based data.![enable-time-view](https://knowledge.cartovista.com/hs-fs/hubfs/Knowledge%20Base%20Import/enable-time-view.png?width=617&name=enable-time-view.png)

ℹ️   Check out [this article](https://knowledge.cartovista.com/analyse-time-based-vector-data?hsLang=en) to see how you can view the data once the map is published.

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