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Ortho Photos and Map

5 REPLIES 5
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Message 1 of 6
Anonymous
667 Views, 5 Replies

Ortho Photos and Map

Hi all,

We are inserting georeferenced ortho photos into our CAD files using
AutoDesk Map 5.0's Map>Image>Insert tool. These ortho photos all contain
world file (.tfw) information. We then trace the features of the ortho
photo as required ensuring everything is to scale etc...

When the drawing files are complete, they are passed onto our GIS
department. They are using ArcGIS 8.2. They are coming back and telling us
that the drawings are not inheriting the georeferenced coordinates from the
orthophotos. Basically they are saying that our drawing information does
not line up with the UTM coordinate info they are bringing in from the US
highway dataset provided with ArcMap.

Are we doing something incorrectly? The orthophotos have been created by
AirPhotoUSA, so I would assume they are correct.

Can someone give me any insight as to what the problem might be?

TIA,

Rob
5 REPLIES 5
Message 2 of 6
Anonymous
in reply to: Anonymous

Have them check the coordinate system that they are using in ArcMap I would
bet that this is a sight differences in what they are using if it's from the
data set on the ERSI CD.

Murph

"Rob Outman" wrote in message
news:E2CAC51A8D76C1C4AB91039346881038@in.WebX.maYIadrTaRb...
> Hi all,
>
> We are inserting georeferenced ortho photos into our CAD files using
> AutoDesk Map 5.0's Map>Image>Insert tool. These ortho photos all contain
> world file (.tfw) information. We then trace the features of the ortho
> photo as required ensuring everything is to scale etc...
>
> When the drawing files are complete, they are passed onto our GIS
> department. They are using ArcGIS 8.2. They are coming back and telling
us
> that the drawings are not inheriting the georeferenced coordinates from
the
> orthophotos. Basically they are saying that our drawing information does
> not line up with the UTM coordinate info they are bringing in from the US
> highway dataset provided with ArcMap.
>
> Are we doing something incorrectly? The orthophotos have been created by
> AirPhotoUSA, so I would assume they are correct.
>
> Can someone give me any insight as to what the problem might be?
>
> TIA,
>
> Rob
>
>
Message 3 of 6
Anonymous
in reply to: Anonymous

The orthophotos will insert according to the coordinate system of your
correlation files. They will not automatically transform to the projection
you have assigned to the drawing. What you need to do is start a new drawing
and create a mosaic of your photos using the map insert tool. The photos
will tile into the map projection and coordinate system that is used by the
correlation files. You will need to know what that projection is. Assign
this projection to your drawing and save it. Start a new drawing and assign
it the projection you want to work in, then attach the drawing contining the
photos. Use a query to bring in the photos from the source drawing. Map will
then transform them to your project projection.

Since you have done the tracing already, but in the wrong projection, you
will want to query the traced entities into your drawing as well. Follow the
same proceedure for querying as with the photos and they should transform as
well.


"Rob Outman" wrote in message
news:E2CAC51A8D76C1C4AB91039346881038@in.WebX.maYIadrTaRb...
> Hi all,
>
> We are inserting georeferenced ortho photos into our CAD files using
> AutoDesk Map 5.0's Map>Image>Insert tool. These ortho photos all contain
> world file (.tfw) information. We then trace the features of the ortho
> photo as required ensuring everything is to scale etc...
>
> When the drawing files are complete, they are passed onto our GIS
> department. They are using ArcGIS 8.2. They are coming back and telling
us
> that the drawings are not inheriting the georeferenced coordinates from
the
> orthophotos. Basically they are saying that our drawing information does
> not line up with the UTM coordinate info they are bringing in from the US
> highway dataset provided with ArcMap.
>
> Are we doing something incorrectly? The orthophotos have been created by
> AirPhotoUSA, so I would assume they are correct.
>
> Can someone give me any insight as to what the problem might be?
>
> TIA,
>
> Rob
>
>
Message 4 of 6
Anonymous
in reply to: Anonymous

Hi Neil,

Thanx for the assistance...

I do have a couple of questions for you... I figured out what you said up to
the attach drawing part. When you say "attach" the drawing, do you mean
Xref it into the current drawing or attach it by some other means? Also,
once I do get the drawing attached, how create a query that will "bring in
the photos from the source drawing"? I know how to run a standard query,
but how do I go about this type?

Sorry for my ignorance, but I just have not had the time to learn much about
map!

Thanx again,

Rob


"Neil Wilson" wrote in message
news:B959DAE4B270B1A48591C9474BEB589F@in.WebX.maYIadrTaRb...
> The orthophotos will insert according to the coordinate system of your
> correlation files. They will not automatically transform to the projection
> you have assigned to the drawing. What you need to do is start a new
drawing
> and create a mosaic of your photos using the map insert tool. The photos
> will tile into the map projection and coordinate system that is used by
the
> correlation files. You will need to know what that projection is. Assign
> this projection to your drawing and save it. Start a new drawing and
assign
> it the projection you want to work in, then attach the drawing contining
the
> photos. Use a query to bring in the photos from the source drawing. Map
will
> then transform them to your project projection.
>
> Since you have done the tracing already, but in the wrong projection, you
> will want to query the traced entities into your drawing as well. Follow
the
> same proceedure for querying as with the photos and they should transform
as
> well.
>
>
> "Rob Outman" wrote in message
> news:E2CAC51A8D76C1C4AB91039346881038@in.WebX.maYIadrTaRb...
> > Hi all,
> >
> > We are inserting georeferenced ortho photos into our CAD files using
> > AutoDesk Map 5.0's Map>Image>Insert tool. These ortho photos all
contain
> > world file (.tfw) information. We then trace the features of the ortho
> > photo as required ensuring everything is to scale etc...
> >
> > When the drawing files are complete, they are passed onto our GIS
> > department. They are using ArcGIS 8.2. They are coming back and
telling
> us
> > that the drawings are not inheriting the georeferenced coordinates from
> the
> > orthophotos. Basically they are saying that our drawing information
does
> > not line up with the UTM coordinate info they are bringing in from the
US
> > highway dataset provided with ArcMap.
> >
> > Are we doing something incorrectly? The orthophotos have been created
by
> > AirPhotoUSA, so I would assume they are correct.
> >
> > Can someone give me any insight as to what the problem might be?
> >
> > TIA,
> >
> > Rob
> >
> >
>
>
Message 5 of 6
Anonymous
in reply to: Anonymous

I see you have posted another request for assistance, so I will assume you
are getting the help you need from your more current post.

"Rob Outman" wrote in message
news:37A9C5277E9AE93CBE0BDC26908C3818@in.WebX.maYIadrTaRb...
> Hi Neil,
>
> Thanx for the assistance...
>
> I do have a couple of questions for you... I figured out what you said up
to
> the attach drawing part. When you say "attach" the drawing, do you mean
> Xref it into the current drawing or attach it by some other means? Also,
> once I do get the drawing attached, how create a query that will "bring in
> the photos from the source drawing"? I know how to run a standard query,
> but how do I go about this type?
>
> Sorry for my ignorance, but I just have not had the time to learn much
about
> map!
>
> Thanx again,
>
> Rob
>
>
> "Neil Wilson" wrote in message
> news:B959DAE4B270B1A48591C9474BEB589F@in.WebX.maYIadrTaRb...
> > The orthophotos will insert according to the coordinate system of your
> > correlation files. They will not automatically transform to the
projection
> > you have assigned to the drawing. What you need to do is start a new
> drawing
> > and create a mosaic of your photos using the map insert tool. The photos
> > will tile into the map projection and coordinate system that is used by
> the
> > correlation files. You will need to know what that projection is. Assign
> > this projection to your drawing and save it. Start a new drawing and
> assign
> > it the projection you want to work in, then attach the drawing contining
> the
> > photos. Use a query to bring in the photos from the source drawing. Map
> will
> > then transform them to your project projection.
> >
> > Since you have done the tracing already, but in the wrong projection,
you
> > will want to query the traced entities into your drawing as well. Follow
> the
> > same proceedure for querying as with the photos and they should
transform
> as
> > well.
> >
> >
> > "Rob Outman" wrote in message
> > news:E2CAC51A8D76C1C4AB91039346881038@in.WebX.maYIadrTaRb...
> > > Hi all,
> > >
> > > We are inserting georeferenced ortho photos into our CAD files using
> > > AutoDesk Map 5.0's Map>Image>Insert tool. These ortho photos all
> contain
> > > world file (.tfw) information. We then trace the features of the
ortho
> > > photo as required ensuring everything is to scale etc...
> > >
> > > When the drawing files are complete, they are passed onto our GIS
> > > department. They are using ArcGIS 8.2. They are coming back and
> telling
> > us
> > > that the drawings are not inheriting the georeferenced coordinates
from
> > the
> > > orthophotos. Basically they are saying that our drawing information
> does
> > > not line up with the UTM coordinate info they are bringing in from the
> US
> > > highway dataset provided with ArcMap.
> > >
> > > Are we doing something incorrectly? The orthophotos have been created
> by
> > > AirPhotoUSA, so I would assume they are correct.
> > >
> > > Can someone give me any insight as to what the problem might be?
> > >
> > > TIA,
> > >
> > > Rob
> > >
> > >
> >
> >
>
>
Message 6 of 6
Anonymous
in reply to: Anonymous

Yes... thank you Neil... the Map manual is very vague in what it tells you,
so I searched about 30 or so posts and found someone with a similar problem!

Thanks for setting me on the right track!

Rob

"Neil Wilson" wrote in message
news:BD7FF0C79F4C9DB51F3117CD12142EB0@in.WebX.maYIadrTaRb...
> I see you have posted another request for assistance, so I will assume you
> are getting the help you need from your more current post.
>
> "Rob Outman" wrote in message
> news:37A9C5277E9AE93CBE0BDC26908C3818@in.WebX.maYIadrTaRb...
> > Hi Neil,
> >
> > Thanx for the assistance...
> >
> > I do have a couple of questions for you... I figured out what you said
up
> to
> > the attach drawing part. When you say "attach" the drawing, do you mean
> > Xref it into the current drawing or attach it by some other means?
Also,
> > once I do get the drawing attached, how create a query that will "bring
in
> > the photos from the source drawing"? I know how to run a standard
query,
> > but how do I go about this type?
> >
> > Sorry for my ignorance, but I just have not had the time to learn much
> about
> > map!
> >
> > Thanx again,
> >
> > Rob
> >
> >
> > "Neil Wilson" wrote in message
> > news:B959DAE4B270B1A48591C9474BEB589F@in.WebX.maYIadrTaRb...
> > > The orthophotos will insert according to the coordinate system of your
> > > correlation files. They will not automatically transform to the
> projection
> > > you have assigned to the drawing. What you need to do is start a new
> > drawing
> > > and create a mosaic of your photos using the map insert tool. The
photos
> > > will tile into the map projection and coordinate system that is used
by
> > the
> > > correlation files. You will need to know what that projection is.
Assign
> > > this projection to your drawing and save it. Start a new drawing and
> > assign
> > > it the projection you want to work in, then attach the drawing
contining
> > the
> > > photos. Use a query to bring in the photos from the source drawing.
Map
> > will
> > > then transform them to your project projection.
> > >
> > > Since you have done the tracing already, but in the wrong projection,
> you
> > > will want to query the traced entities into your drawing as well.
Follow
> > the
> > > same proceedure for querying as with the photos and they should
> transform
> > as
> > > well.
> > >
> > >
> > > "Rob Outman" wrote in message
> > > news:E2CAC51A8D76C1C4AB91039346881038@in.WebX.maYIadrTaRb...
> > > > Hi all,
> > > >
> > > > We are inserting georeferenced ortho photos into our CAD files using
> > > > AutoDesk Map 5.0's Map>Image>Insert tool. These ortho photos all
> > contain
> > > > world file (.tfw) information. We then trace the features of the
> ortho
> > > > photo as required ensuring everything is to scale etc...
> > > >
> > > > When the drawing files are complete, they are passed onto our GIS
> > > > department. They are using ArcGIS 8.2. They are coming back and
> > telling
> > > us
> > > > that the drawings are not inheriting the georeferenced coordinates
> from
> > > the
> > > > orthophotos. Basically they are saying that our drawing information
> > does
> > > > not line up with the UTM coordinate info they are bringing in from
the
> > US
> > > > highway dataset provided with ArcMap.
> > > >
> > > > Are we doing something incorrectly? The orthophotos have been
created
> > by
> > > > AirPhotoUSA, so I would assume they are correct.
> > > >
> > > > Can someone give me any insight as to what the problem might be?
> > > >
> > > > TIA,
> > > >
> > > > Rob
> > > >
> > > >
> > >
> > >
> >
> >
>
>

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