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Georeferencing an Image using ArcMap 10.6

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Tutorial on how to georeference or rectify an image using vector data. The tutorial shows the steps on how to rectify an image that does not have spatial reference to the spatial reference of the vector data.
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Download data url: 0m15s
Add image: 0m56s
Activating Georeferencing Tool: 1m42s
Fit to Display: 2m5s
First control point: 3m5s
Warning: 4m3s
Open Viewer: 4m22s
View Link Table: 5m24s
Rectify: 6m46s

Опубликовано:

27 авг 2024

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Комментарии : 16

@ThePeterfrancon 5 лет назад

Great tutorial. Thank you. I have to do this on so many TIFFs tomorrow at work!

@giuliaruocco4412 5 лет назад

Thank you very much, great explanation.

@vsgeo 6 лет назад

Thank you, but why so many control points? For better precision? Usually 4-5 well distributed (in different corners) points is enough. The part about saving the raster was useful though!

@LuisCBerrocal 6 лет назад

Hi! Thanks for the input. True 4 to 5 well distributed points works well with Affine transformation. My problem was the I had a poor distribution of points (and some colinear points) due to the fact that the vector data was considerable older than the image.

@curtvprice 5 лет назад

@@LuisCBerrocal Also if is an airphoto it could have additional distortions (relief displacement, crabbing) that could be adjusted for with a 2d order transformation and lots of control points. Especially if you don't have time to get a DEM and due true ortho photo creation.

@LuisCBerrocal 5 лет назад

@@curtvprice yes Curtis! Thank you for pointing that out. This tutorial is focused to my students running the intro to GIS course. I will make another video attending this generalization.

@miguelpalu1714 5 лет назад

Great tutorial, but not convinced about the resampling type when saving the raster data. Your spatial references were buildings and other objects with well defined boundaries, thus discrete objects. Why using bilinear interpolation, then?

@LuisCBerrocal 5 лет назад

The quality of the picture was very poor and the prescion of the building layer was unknown. Please advise on what interpolation you would recommend.

@curtvprice 5 лет назад

It still is an airphoto so you want the output to be smooth. Nearest neighbor would give the image a blocky appearance making it harder to interpret. So bilinear or even cubic is appropriate for the imagery.

@kinonvm8298 6 лет назад

ArcGIS Desktop is support on Apple already now

@LuisCBerrocal 6 лет назад

Unfortunately as of this date ArcGIS does not run on Mac OsX I'm using a Windows emulator called Parallels...

@kinonvm8298 6 лет назад

Wow... Is it good workly?

@LuisCBerrocal 5 лет назад

Not that I know of.

@curtvprice 5 лет назад

@@LuisCBerrocal I think Parallels runs ArcMap great, but you need to make sure you have enough memory to allocate to Parallels (ArcMap really needs 8G RAM on the VM to run well). I run Parallels off a boot camp partition, this allows me to reboot and run 100% Windows if I need more resources to do something more intensive. Thank you for this tutorial!

@LuisCBerrocal 5 лет назад

@@curtvprice Hi!! yes that is what I use Parallels to work with ArcGIS in my Mac