ESRI Basemap Imagery Acquisition Dates

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08-03-2018 01:17 PM
MichaelLohr
Occasional Contributor II

When using one of the ESRI streamed in aerial layers from ArcGIS Online, how does one determine what the acquisition date would be for any particular area of interest? This is often important when using imagery zoomed in to local or regional levels. 

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CarmelConnolly
Regular Contributor

Hi Michael, 

There's a webmap with imagery metadata you can access: https://www.arcgis.com/home/item.html?id=c03a526d94704bfb839445e80de95495 

This blog post might be useful too: Learning more about the World Imagery basemap  

Carmel

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CarmelConnolly
Regular Contributor

Hi Michael, 

There's a webmap with imagery metadata you can access: https://www.arcgis.com/home/item.html?id=c03a526d94704bfb839445e80de95495 

This blog post might be useful too: Learning more about the World Imagery basemap  

Carmel

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MichaelLohr
Occasional Contributor II

Both the webmap link you provided and the blog link are useful and provide the required metadata information. Thanks so much for the links.

Adding the World Imagery layer through the Living Atlas produces  the ability to get metadata pop up boxes, but only if added as a layer to your online map? Adding the same layer as a basemap, does not result in the metadata pop up boxes. So it seems a little clunky to have to add the same imagery layer to your webmap after already having the same layer as your basemap, in order to get the metadata functionality. Is this the way it is supposed to work?  

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CarmelConnolly
Regular Contributor

Hi Michael, 

You don't have to use it exactly that way - If you check out the layer, you'll see that there are 5 layers within it:

The Citations contains the information for all the Imagery Basemap resolutions, you can add this layer to your webmap seperately (https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/4) through Add > Add Layer from Web.

This layer has no symbology but gives you the pop up functionality. You could add the layer in 3 times and use scale thresholds & filters so the relevent pop up only appears at the right scale.

Carmel

MichaelLohr
Occasional Contributor II

I see that the Citation layer can be added as a separate layer and that would have some usefulness, at times. I think you have missed my main question a little. If you add the World Imagery  service as a basemap, then you do not get the metadata functionality, correct? 

It seemed redundant to have to add another layer then to get the metadata functionality. Perhaps the software prevents the metadata functionality in the basemaps, and that is the reason.

Adding the Citation layer in 3 times and resetting the scales and filters will no doubt work, but seems easier to just add the World Imagery as a map layer. I just made a map using the plain dark canvas as the basemap and the World Imagery as the last map layer. Seems to work fine like that. 

Either way, this additional functionality is great and not difficult to get working, even if adding a separate layer. Having it work through the basemap just streamlines things a little. 

Thanks for your thoughts.

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CarmelConnolly
Regular Contributor

Hi Michael, 

Yep you're correct, the metadata functionality is not available when set as the basemap of a webmap. Potentially others would have the same requirement as you, so it never hurts to add a request through the https://community.esri.com/community/arcgis-ideas site.

Thanks, 


Carmel

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JoshuaBixby
MVP Esteemed Contributor

Too bad there isn't a Rube Goldberg Workflow Contest, you could document this one with an infographic and have a great shot at winning!

MichaelLohr
Occasional Contributor II

Haha!. Right.

Go vote for it on the https://community.esri.com/community/arcgis-ideas page. 

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JoshuaBixby
MVP Esteemed Contributor

Done.  Make sure you upvote yourself.

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YvesLeger
Occasional Contributor

I think it would be more useful to everyone if the acquisition date was shown by default, in addition to the source, in the bottom-right corner of the imagery basemap as in "the one that shall not be named" mapping system (see below):

GoogleMaps.png

Is this not possible?