Were Sorry an Error Has Occured Uploading a Layer to a Google Map

Google Maps is a free, wonderful and, for me, indispensable tool of local and international travel.
Every bit my iPhone turned aureate through the addition of "Starred Places", I began to explore how I could add some personal info to these places to share and to aid my retention.

Recommended Use Pattern for iOS users

Avoid using Saved lists in general every bit they do non include GPS information and then cannot exist uploaded to My Maps or any other location systems. Locations changing in the hereafter may also non be plant by the Google URL in your Saved List.
Use the Saved List called Want to Go for trip planning, adding notes whenever you experience it necessary.

Use Labeled Places during a trip to label places really visited.
During or after the trip, check all your Want to Get locations and add them every bit Labelled Places IF you visited them (adding some text to the label is mandatory)
To extract this trip listing, and add to My Maps Get to Google TakeOut and download Maps

Locate the "Labelled places.json" file and elevate into https://json-csv.com/ and download the converted csv file.
Open the csv in an editor (e.g. sheets, excel etc) and rename the headings due east.g. Lat, Long, etc

Open Google My Maps and import the data as a new layer into an existing map or a new one
Upload the csv into Google My Maps every bit a new map, or an new layer in an existing map.

At present you lot can comment the map:

Add together unlimited notes to each location (unfortunately any links in your notes will non be clickable)
Add your ain photos to notes (although these pictures have a habit of disappearing occasionally for no known reason)
Alter the location icons to the built in fix or even your own (e.1000. numbered)
Add travel paths.

Recommended Use Pattern for Android Users

Use "Want to Get" for trip planning, adding notes whenever you lot feel it necessary
Use My Maps Android app, during your trip to add places and notes that you lot really visited

Google, please .......

Develop a My Maps app for iOS
Add together GPS information to Saved Places csv exports so that they can exist uploaded into My Maps
Add csv export option from My Maps.

KML and MMZ conversion add extra complexity to combining information.
My Maps allows csv import, why not csv output ?
csv is the easiest way to combined information and then reimport.
This will go around the problem of unreliability of dragging locations between layers in My Maps
This will get effectually the limitation of 10 layers in My Maps.

Add together Import into existing layer to My Maps (because dragging locations from 1 map to another is so buggy
Add together Export to CSV from Tabular array View in My Maps
Allow Copy and Paste rows in Table View in My Maps

Details of Google Map Operations as at APR2020

Google Maps Family Information Relationships

This is when I discovered the Google Maps information connectivity was wonderfully complex - only less than elegant. What we accept (as at APR2020) is:

Information/Lists/ Labels in Google Maps:

Labelled - Blue Flag

Visibility: Nether all other Saved Places
Consign via Google TakeOut - Maps - Labelled places.json

Starred Places - Yellow Star

Visibility (mobile) - Under Favourite Places; Higher up all other lists
Visibility (desktop) - Nether all Saved Places (Why is this visibility unlike ???)
Export via Google TakeOut - Maps (your places) - Saved Places.json

Favourite Places - Red Middle

Visibility: Above all other Saved Places
Export via Google TakeOut - Saved - Favourites.csv (No GeloLocation/GPS data)

Saved places - Custom Lists

Visibility (Mobile) nether Favourite Places, Saved Places and Labelled Places
Export via Google TakeOut - Saved - cyprus.csv (No GeloLocation/GPS data)

Conversion between formats exported past Google TakeOut:

CSV exports with championship and Google Maps URL but without GPS data
JSON exports with many fields including title and GPS and can be converted to CSV easily online at https://json-csv.com/. After converting, edit csv to get rid of redundant information and resequence for cleanest and most useful My Maps data upload.
KMZ can be converted to CSV at https://mygeodata.cloud/converter/kmz-to-csv

Labelled Places

Google says "Personal places will exist used across Google products, for personalized recommendations, and for more than useful ads."

The Labeled Places label usually precedes or sometimes replaces the google map name when viewing the map:
On iOS devices, different sequences demand to exist used to add a label depending on whether the location is already a named map location.
Labels can be upwards to 40 characters long

Labelled places can exist quickly integrated into Google My Maps:

exported in JSON format (which includes the GeoLocation GPS) through Google TakeOut
converted to CSV and headings improved
imported into Google My Maps
deleted from Google Maps (the desktop estimator deletion is far faster than the sequence on a mobile device)

Google Maps - Your Places - Saved

Saved lists let users to add places to

predefined lists: Favourites, Want to Go and Starred Places.
user divers lists

The visibility of Saved Lists can be turned off and on.
Each list tin be shared through a unique URL with friends
All lists except for Starred places can be exported through Google TakeOut which exports them as seperatecsv files (e.g. Saved/republic of cyprus.csv) with NO Geolocation GPS Data
csv does Non contain GPS location information
In Google Maps, lists are displayed in order of last utilize.
On iOS devices, notes of unlimited (?) length can exist added at the same time as adding the identify to the list

On Desktops, notes of unlimited (?) length can be added by going to Your Places - Saved - Edit List

Starred places is a special list which is synchronised with Google Bookmarks (i.eastward. every location added to Starred places creates a Google Bookmark.

Deleting the Google Bookmark volition delete the starred place on Google Maps).
Google bookmarks tin have Labels and Notes added to them, but these do not brandish in Google Maps.
Google Bookmarks can just exist exported equally HTML which is very difficult to catechumen to CSV for import into Google My Maps.

Starred placescannot accept a annotation added
Starred places are not exported with other Saved Places lists.
Starred places are exported from Google TakeOut as Maps (your places)/Saved Places.json which includes the GPS location (unlike all other saved lists).

Google Maps - Visited Places

These are locations from your timeline (if you lot have allowed Google to track your locations through Google Maps)
These locations tin be exported through Google TakeOut every bit Location History in JSON format which includes GPS data.

Google Maps - My Maps

Google My Maps is the nigh sophisticated mapping tool inside the Google arrangement. It allows:

any number of user created maps (express only past Google Drive storage), which tin incorporate:

up to 10 seperate layers, with
each layer having upwards to 2000 seperate locations

each location can have

custom notes of unlimited length in user defined fields. URL's within the notes are active when viewed on a desktop, but inactive when viewed on iOS mobile devices. (This is annoying, every bit it ways that data links that would exist useful during a trip cannot be accessed from an iOS device. (I wonder if this is truthful for the Andoid MyMaps App).
unlimited custom images displayed with the location detail. These can be uploaded from your phone, or can exist linked to your photo library or any web image.
custom icons

the map data can exist:

viewed and edited in table format
exported through Google TakeOut creating a seperate KMZ file for each Map
exported from within My Maps creating a seperate KML or KMZ file for each map layer.

Locations tin can be moved between layers (as long as the layers have the same fields)

Google My Maps has the near fatal flaw of not being able to be edited in whatever style from iOS devices. i.e. it is read simply.
Android Bone users have full access via the My Maps Android app

Google Maps - Labelled places: A flexible way to record places while you travel

Labelled places allows you lot to tape locations before and during trips including a 35 graphic symbol annotation.
If I location recorded earlier the trip was non memorable, just delete the label and information technology will disappear from the list.
After the trip, Labelled places can be downloaded as a seperate JSON file from Google TakeOut (export the Maps - All data Types.)

The Labeled places.json file can then be opened in a text editor:

Copied and pasted into a JSON to CSV conversion website and a CSV file downloaded:

Improve the headings [and add columns that y'all desire. Remember that, after import into My Maps , locations tin can only be moved around between layers if they have the same data columns (fields)]:

Upload the csv into My Maps as a new map, or an new layer in an existing map.

Equally there is a limit of 10 layers, when you get to the limit, you will need to individually drag locations from one map to another (sometimes works - sometimes doesn't)

(much more reliable, but more work) export 2 layers individually to KML, convert them to CSV, combine them and re-import as one layer.

Google Maps - My Maps - The best way to store and view locations with personal annotations

Google Maps on desktop or mobile displays maps PLUS any lists that yous have non hidden

When you want to call back a list of places that yous take stored and annotated, just get to Google My Maps and turn on the map that contains the information you wish to utilise.

Clicking on whatever location marker volition display your annotations and any pictures that you take linked.

Google Maps System Quirks

Google TakeOut exports My Maps Information in KMZ format. I can only notice i site, mygeodata.cloud that reliably converts from this format to CSV, and information technology only allows 3 free conversions per month.
KMZ files are a compressed package of multiple layers of KML data. They can be opened by some text editors (east.g. MacOS TextWrangler):

The KML code within KMZ files is not correctly interpreted by most KML to CSV conversion websites. So, if you want like shooting fish in a barrel and accurate conversion to CSV, the all-time option is to export KML from My Maps one layer at a time:

Google My Maps Export to KML then to CSV creates a range of additional fields to the ones that were imported from CSV:

CSV import had column headings of:

Trip Description
Category
Notes
Address
Breadth
Longitude

KML export has columns of:

name e.thou. Tiger Sky Tower, Sentosa Island
description e.g. Trip Clarification: Singapore 2002 c Chelt SC
Category: Place
Notes:
Address: 41 Imbiah Route, Sentosa Island, Singapore 099707
Latitude: 1.2549754
Longitude: 103.8175937

Google My Maps - Consign to KML too sometimes generates KML files that cannot exist recognised by KML to CSV convertors:

www.convertcsv.com says Invalid KML
http://world wide web.monster.com.tw/kml2csv says Format Error
https://www.acugis.com/2csv/ does not work for any KML I have tried !!
https://choonchernlim.com/kmlcsv/ is a desktop application requiring install of Java. Information technology reports:ERROR: An unexpected fault has occured: Unable to read KML file..
https://mygeodata.cloud/converter/kmz-to-csv (online service with three free conversions per month) says: Import mistake. No spatial data were recognized in your uploaded information. We are pitiful. Make certain you have uploaded all relevant files of the dataset.
OR even Google My Maps which reports "Aww Snap!: ane cavalcade was skipped when parsing the KML file, because there were also many columns, or some column names were too long or contained invalid characters. You lot may want to ready the file and upload once again."
One solution: Import the troublesome KML into a new Google My Map and it will reject the data column/field that is causing the problem (normally it is the hidden HTML field "clarification")

A more complete solution would allow any of the Google Maps suite to export/import to each other in at to the lowest degree one common format e.g. KML, JSON or CSV. Ideally in a range of formats.....

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Source: http://digbyshelp.blogspot.com/2018/10/google-maps-ins-and-outs.html