While we work on improving native offline support, this guide explains how to get your maps onto your phone for offline use. There are several options, but in this article we have focused on Esri Field Maps (for those with an ArcGIS license) or Organic Maps (a free, open-source alternative). Other tools may also work.

Step 1: Prepare your data

1. In Hortis, open the material list and apply a filter so only plants with a recorded position are shown.
2. Download the filtered list as a CSV file.

Step 2 - Option A: Organic Maps (free, no account required)

With this approach, Organic maps will display the map markers on an OpenStreetMap base map and the you will see the accession number and the scientific name when clicking the marker.

1. Download and install the Organic Maps app from organicmaps.app.
2. Convert your CSV file to KML format using mygeodata.cloud/converter/csv-to-kml or convertcsv.com/csv-to-kml.htm.
3. Select Convert to KML.
   1. Under advanced options, set Accession Number as the Name field and Scientific Name as the Description field.
   2. Tip: Consider merging the Accession Number and Qualifier into a single column first, and use that combined value as the Name field.
4. Download the KML file and copy the file to a shared drive. 
   1. On Android — tap the file in your file manager or email attachment, then choose Open with → Organic Maps
   2. On iOS — tap the file in Files, Mail, or any app that supports sharing, then use the share sheet and select Organic Maps

Step 2 - Option B: ArcGIS Field Maps (requires ArcGIS license)

With this approach, the ArcGIS Field map will display the map markers on an base map of your choice and you can also configure how the map markers is displayed. When you click on the marker, all the data included in the csv file will be available to you.

1. Upload your CSV to ArcGIS Online — either by importing it directly as a hosted feature layer, or by creating a layer manually in ArcGIS and publishing it to ArcGIS Online.
2. Once the map is published, it should be available to view and use offline in the ArcGIS Field Maps app.