00:05Hi, I'm Adam, a GIS analyst at Esri.
00:09ArcMap has become a powerful image workstation, and enhancements I'm going to show you are certain to address how we can use and be more productive with our imagery.
00:19We now have a dockable image analysis window that puts the tools we commonly use right at our fingertips.
00:26As a result, we can work with imagery and use imagery faster and easier to be more productive.
00:32I'm very excited to show you these new enhancements.
00:35Let's take a look.
00:38We're looking at my study area, the Teapot Dome in Wyoming.
00:42And you can see that my map is looking pretty, pretty weak right now.
00:46But we all have access to online services, hosted by Esri, to help us make our maps better.
00:53In this case, I'm going to bring in a world imagery service, right into my Teapot Dome study area.
01:00We can see that we've got pretty good resolution, coming off of this hosted service.
01:05I also have image services that I can bring, powered by ArcGIS Server.
01:11So let's bring in an image service, and let's learn a little bit about the service that we've brought in.
01:19So I can see that by identifying this, that we've actually got two images in this image service.
01:26Well, I'm only interested in working with the DOQQs in this case.
01:32So let's go ahead and tell the service only to bring us back the DOQQs.
01:37So I'll just set up a quick definition query.
01:45And so now we're only viewing the DOQQs displayed from this hosted service.
01:52I have one more service that we can add.
01:54This is an IKONOS service.
01:56This IKONOS service is housing multispectral imagery, and it's displaying it for us here in our view.
02:04So I've got a study area that I'm interested in working with at the Teapot Dome…
02:09…and I want to show you how we can use these image services for analysis.
02:14And to do that, I'm going to open up the new image analysis window.
02:19Let's select our service. Let's do a quick vegetation analysis.
02:24Click of a button. Here's our vegetation analysis. We can make out the water bodies.
02:29And if I pan, this is all happening dynamically, on demand, for this vegetation analysis.
02:36We can make up all the vegetation that lines the creek beds in this area of the Teapot Dome.
02:42So I'm happy with the analysis that we're doing so far, but you know, I really need to bring down this imagery and use it on my local machine.
02:51So I'm going to identify my study area.
02:56I think this is the area, yep, this is the area that I want to work with.
03:00I'm going to right-click on the image service…
03:03…and let's go ahead and download the rasters that I need for this area.
03:07I'm only going to grab the rasters for the view that we're looking at right now.
03:12And I'd only like to grab the TIFF images to download.
03:17Let's download these.
03:18One thing that I should point out is that we were looking at one seamless image in our map, but this seamless image was actually powered by a number of different images.
03:28In this case, multispectral imagery…
03:30…blue, red, green, near-infrared. And there's even a panchromatic layer.
03:35So I have just downloaded these images to my machine.
03:39Let's turn these off. And let's add them to our view.
03:43So here is the red, here's the green, the blue, the near-infrared, and the panchromatic layer we just downloaded.
03:52Add these to view.
03:56And if I zoom out, you sure can make out the clipped boundary that we just exported from that service.
04:03Now, using the Image Analysis toolbar, I can do some analysis with these.
04:08So we've got these different images that we can work with.
04:12And what I'd like to do is create a composite image, a true-color composite image, of these.
04:18So I'm just going to select the bands that I'd like to work with, and I'm going to create a composite.
04:23And to do that, I just click a button.
04:26So here we can see the image that we just created, a true-color representation of this area.
04:33And if I turn on the basemap below it…
04:36…we'll zoom in to learn a little bit more about the imagery that we're working with.
04:40It appears that it doesn't quite line up with the basemap service, and that's to be expected, that's fine.
04:47We can use the Image Analysis toolbar here to reference the elevation information I have for the Teapot Dome, to orthorectify the image that we were just looking at.
05:00So now we can see that the river that we were looking at now lines up smoothly with the imagery that we are working with.
05:08But one other thing that you might note is that we sure can see a lot of pixelation in the multispectral data that we're working with.
05:16Well, that's okay, because our panchromatic layer is going to help us smooth this out.
05:22But before we do that, we need to make sure that we reference our panchromatic layer appropriately with the terrain information that we have.
05:32So I'm going to orthorectify that.
05:34Here you can see the panchromatic layer and how smooth it is, and that it lines up again with the river that we were using as a reference.
05:43I'm going to turn those layers off and grab the two outputs that we just created.
05:48And let's now pan-sharpen those, to have our final product here, in view.
05:54A true-color representation, pan-sharpened, and orthorectified.
06:00Imagery is a valuable tool in our daily GIS workflows, and these new enhancements are going to help us work faster and generate better results.
ArcGIS Using Imagery
- Recorded: Jun 29th, 2010
- Runtime: 06:12
- Views: 13028
- Published: Aug 25th, 2010
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