When you view the data, time will be converted to the local time, potentially changing the date. Therefore, if you don't specify a time zone when you publish, your data will be stored with a time value of midnight (UTC). If the date fields in your CSV file contain a date but not a time value, a time value of midnight is assigned when you publish a hosted feature layer. For example, when a CSV file containing date fields is published with pacific time selected as the time zone, all date and time values in your CSV file will have eight or seven hours added as part of the conversion to UTC, depending on whether the date values fall within daylight savings time. The specified time zone is used to mitigate the offset because ArcGIS Online assumes date and time data to be in UTC. When you publish a hosted feature layer from a CSV file, you can specify the time zone of the data. Pacific time is eight hours behind UTC except during daylight saving time-when UTC time is 10:00 AM, it is 2:00 AM pacific time. For example, suppose your computer is set to pacific time (United States and Canada). This is done by querying your computer and asking it for its time zone setting. Whenever a date field is displayed, the date is converted from UTC time into your local time. The alternative of storing date and time in a local time zone leads to all sorts of problems, especially if you, or the server hosting your data, move to another time zone. Dates are assumed to be UTC because the physical location of the server hosting your data can be anywhere in the world. The following location fields are supported:ĭate fields in CSV files are assumed to contain Universal Time Coordinated (UTC) date and time. If Map Viewer Classic cannot determine the coordinate information or if your file contains address or place information instead, you are prompted to review the location fields and change them if necessary.
*Latitude and longitude information must be in decimal degrees.
ArcGIS Online supports the following coordinate reference systems: If your file has coordinate fields, Map Viewer Classic uses these fields to locate the features on the map. Coordinates must be in two separate fields. Addresses can be stored in one or more fields. The first row in the file must contain the location field names. Location fields can contain coordinate, address, or place information. To add a CSV or TXT file from a local drive or a CSV file on the web to your map as a feature layer or to publish a local CSV file as a hosted feature layer, the file must include location fields. The following sections contain information about supported formats for location data in CSV and TXT files, supported formats and considerations when using date and time data in CSV files, supported date fields in TXT files, and what you need to consider when adding CSV and TXT files to Map Viewer Classic. Other separators are not supported.Īs no data types are enforced in the file, ArcGIS Online relies on the field names and specific formatting in the fields to interpret the data type that should be applied. In TXT files, fields can be separated with a comma, semicolon, or tab. In CSV files, fields are always separated by commas. The first row in the file defines the names for all subsequent fields. If you have privileges to publish hosted feature layers, you can publish the data in CSV files.ĬSV and TXT files store information in plain text.
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