ArcGIS Pro

How to mosaic multiple images into one convenient chunk in ArcGIS Pro

Ok ok, you probably already knew this. But if you didn’t it will make your rastery life so much easier. This is how you can create a “mosaic” in ArcGIS Pro from a bunch of separate images so you can work with them like they’re just one thing. Big time-saver and your maps will look better.

0:00: Rudely short introduction. Finding and adding separate DEM images.

0:30: Mosaic to New Raster tool (with little tradecraft tidbit about dragging a bunch of layers into the tool’s input).

1:00: Optionally defining an output spatial reference.

1:22: Pixel type? Bits? Signed vs unsigned? Check it.

1:41: How to check the pixel depth of an input image layer (also, they all have to be the same if you want to mosaic them).

2:01: Inadvertent “new email” chime in the background because I forgot to close Outlook before recording. Sigh.

2:13: A look at the pyramid layers ArcGIS Pro automatically makes when you add images to a project, and the output mosaic’s files.

2:42: More tradecraft. If you hold the “Ctrl” key when clicking checkboxes in the contents list, it applies to ALL the checkboxes!

2:48: Proving to you, my friends, that the resulting mosaic is indeed a single image (by changing the raster symbology and also making a seamless hillshade).

Happy mosaicing! John

About the author

I have far too much fun looking for ways to understand and present data visually, hopefully driving product strategy and engaging users. I work in the Content team at Esri, pushing and pulling data in all sorts of absurd ways -and then talking about it. I also get to spend time with the Story Maps team, working on fun and useful user experiences. When I'm not doing those things, I'm chasing around toddlers and wrangling chickens, and generally getting into other ad-hoc adventures. Life is good. Loads more how-to posts: esri.com/arcgis-blog/author/j_nelson/ My YouTube channel: youtube.com/c/JohnNelsonMaps Loads of Styles for Pro: esriurl.com/nelsonstyles Instagram: instagram.com/johnmnelson/

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