Layer's don't match / Wrong Projection?

AnjaWietholter · ‎05-19-2010

I have a table with geocoded Lat/Long Values that I want to add as point features to my map. However when I add the table and add X/Y data (Tools-Add X/Y data) the data is added to the map but the projection doesn't match up. I did compare the coordinate systems and they appear to be the same whoever the extent doesn't match up.

My Shapefile with the Lat/Long Points has similar values in projected coordinates compared to the decimal degrees which leads me to believe it doesn't project?

Here is an example. My Zip Code layer in decimal degrees:
West: -117.597982
East: -116.080157
North: 33.511553
South: 32.530161

In projected or local coordinates:
Left: 6150765.000000
Right: 6613436.500000
Top: 2129760.000000
Bottom: 1775304.125000
NAD_1983_StatePlane_California_VI_FIPS_0406_Feet

And my XY layer that doesn't match:

Decimal:
West: -136.179977
East: -136.179964
North: 25.945595
South: 25.945576

In projected or local coordinates:
Left: -117.388904
Right: -116.371055
Top: 34.517990
Bottom: 32.543795

NAD_1983_StatePlane_California_VI_FIPS_0406 also

I tried about everything. If somebody could help me with this it would be GREATLY appreciated.

MelitaKennedy · ‎05-19-2010

I have a table with geocoded Lat/Long Values that I want to add as point features to my map. However when I add the table and add X/Y data (Tools-Add X/Y data) the data is added to the map but the projection doesn't match up. I did compare the coordinate systems and they appear to be the same whoever the extent doesn't match up.

My Shapefile with the Lat/Long Points has similar values in projected coordinates compared to the decimal degrees which leads me to believe it doesn't project?

Here is an example. My Zip Code layer in decimal degrees:
West: -117.597982
East: -116.080157
North: 33.511553
South: 32.530161

In projected or local coordinates:
Left: 6150765.000000
Right: 6613436.500000
Top: 2129760.000000
Bottom: 1775304.125000
NAD_1983_StatePlane_California_VI_FIPS_0406_Feet

And my XY layer that doesn't match:

Decimal:
West: -136.179977
East: -136.179964
North: 25.945595
South: 25.945576

In projected or local coordinates:
Left: -117.388904
Right: -116.371055
Top: 34.517990
Bottom: 32.543795

NAD_1983_StatePlane_California_VI_FIPS_0406 also

I tried about everything. If somebody could help me with this it would be GREATLY appreciated.

Thank you for posting the reported data extents! The XY layer should be using a geographic coordinate system like NAD 1983, not California VI. You need to tag it with its current coordinate system. ArcMap can project it on the fly to match your other data. If you want to convert it permanently to State Plane, right click the layer in the table of contents and select Data, Export Data. In the export dialog, set it to use the data frame's coordinate system.

Melita

AnjaWietholter · ‎05-19-2010

Melita,

thank you for your help! This solved the problem! You're the best!

-Anja:)

GB · ‎03-01-2011

Hello!
I'm facing a similar problem as my projection doesn't match up.

Layer 1
Projected coordinate system name: WGS_1984_UTM_Zone_33N
Geographic coordinate system name: GCS_WGS_1984

Bounding coordinates
Horizontal
In decimal degrees
West: 10.511349
East: 10.511368
North: 0.000425
South: 0.000412
In projected or local coordinates
Left: 10.385948
Right: 12.477436
Top: 47.091793
Bottom: 45.673069

Layer 2
Projected coordinate system name: WGS_1984_UTM_Zone_33N
Geographic coordinate system name: GCS_WGS_1984

Bounding coordinates
Horizontal
In decimal degrees
West: 16.362326
East: 18.504936
North: 47.129382
South: 45.640333
In projected or local coordinates
Left: 606088.187500
Right: 766033.625000
Top: 5220491.203121
Bottom: 5059756.878740

What can I do? I tried to export data setting the data frame's coordinate system, but it didn't work.
Your help would be highly appreciated.
Giorgia

MelitaKennedy · ‎03-01-2011

Hello!
I'm facing a similar problem as my projection doesn't match up.

Layer 1
Projected coordinate system name: WGS_1984_UTM_Zone_33N
Geographic coordinate system name: GCS_WGS_1984

Bounding coordinates
Horizontal
In decimal degrees
West: 10.511349
East: 10.511368
North: 0.000425
South: 0.000412
In projected or local coordinates
Left: 10.385948
Right: 12.477436
Top: 47.091793
Bottom: 45.673069

Layer 2
Projected coordinate system name: WGS_1984_UTM_Zone_33N
Geographic coordinate system name: GCS_WGS_1984

Bounding coordinates
Horizontal
In decimal degrees
West: 16.362326
East: 18.504936
North: 47.129382
South: 45.640333
In projected or local coordinates
Left: 606088.187500
Right: 766033.625000
Top: 5220491.203121
Bottom: 5059756.878740

What can I do? I tried to export data setting the data frame's coordinate system, but it didn't work.
Your help would be highly appreciated.
Giorgia

Hi Giorgia,

Your data has a similar issue to Anja's. Layer 1 should be defined with a geographic coordinate system. See how similar its projected/local extents are compared to layer 2's decimal degree extents? Anyway, try defining it as WGS 1984.

Now, about layer 2. As it is, these two layers will not overlay. The longitude values are different. Layer 1 is between 10E and 12E, while Layer 2 is between 16E and 18E. However, are you sure that Layer 2 shouldn't be using WGS 1984 UTM Zone 32N rather than Zone 33N? I think that would place the data in the same location as Layer 1 and put the data in northern Italy, rather than closer to Hungary.

Melita

GB · ‎03-03-2011

Thank you very much for your advice and information. I modified the coordinates, but I have still some problems.

1) layer 1
Horizontal coordinate system
Geographic coordinate system name: GCS_WGS_1984
Details
Geographic Coordinate System
Latitude Resolution: 0.000000
Longitude Resolution: 0.000000
Geographic Coordinate Units: Decimal degrees

Geodetic Model
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
_________________

Bounding coordinates
Horizontal
In decimal degrees
West: 10.385948
East: 12.477436
North: 47.091793
South: 45.673069
In projected or local coordinates
Left: 10.385948
Right: 12.477436
Top: 47.091793
Bottom: 45.673069

2) layer 2
Horizontal coordinate system
Projected coordinate system name: WGS_1984_UTM_Zone_32N
Geographic coordinate system name: GCS_WGS_1984
Details
Grid Coordinate System Name: Universal Transverse Mercator
UTM Zone Number: 32
Transverse Mercator Projection
Scale Factor at Central Meridian: 0.999600
Longitude of Central Meridian: 9.000000
Latitude of Projection Origin: 0.000000
False Easting: 500000.000000
False Northing: 0.000000

Planar Coordinate Information
Planar Distance Units: meters
Coordinate Encoding Method: coordinate pair
Coordinate Representation
Abscissa Resolution: 0.000000
Ordinate Resolution: 0.000000

Geodetic Model
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
_________________

Bounding coordinates
Horizontal
In decimal degrees
West: 10.362326
East: 12.504936
North: 47.129382
South: 45.640333
In projected or local coordinates
Left: 606088.187500
Right: 766033.625000
Top: 5220491.203121
Bottom: 5059756.878740

I can see the map with the two layers, but the borders don't coincide. (layer 1 represents municipalities, layers 2 represents the provinces where those municipalities are located)

I also changed layer 2 in GCS_WGS_1984 but I have still the same problem, that is, borders don't overlap.

2bis) layer 2

Horizontal coordinate system
Geographic coordinate system name: GCS_WGS_1984
Details
Geographic Coordinate System
Latitude Resolution: 0.000000
Longitude Resolution: 0.000000
Geographic Coordinate Units: Decimal degrees

Geodetic Model
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
_________________

Bounding coordinates
Horizontal
In decimal degrees
West: 10.387225
East: 12.478793
North: 47.093540
South: 45.674821
In projected or local coordinates
Left: 10.387225
Right: 12.478793
Top: 47.093540
Bottom: 45.674821

Is there anything else I can possibly do?
Thank you.
Giorgia

MelitaKennedy · ‎03-03-2011

Thank you very much for your advice and information. I modified the coordinates, but I have still some problems.

1) layer 1
Horizontal coordinate system
Geographic coordinate system name: GCS_WGS_1984
Details
Geographic Coordinate System
Latitude Resolution: 0.000000
Longitude Resolution: 0.000000
Geographic Coordinate Units: Decimal degrees

Geodetic Model
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
_________________

Bounding coordinates
Horizontal
In decimal degrees
West: 10.385948
East: 12.477436
North: 47.091793
South: 45.673069
In projected or local coordinates
Left: 10.385948
Right: 12.477436
Top: 47.091793
Bottom: 45.673069

2) layer 2
Horizontal coordinate system
Projected coordinate system name: WGS_1984_UTM_Zone_32N
Geographic coordinate system name: GCS_WGS_1984
Details
Grid Coordinate System Name: Universal Transverse Mercator
UTM Zone Number: 32
Transverse Mercator Projection
Scale Factor at Central Meridian: 0.999600
Longitude of Central Meridian: 9.000000
Latitude of Projection Origin: 0.000000
False Easting: 500000.000000
False Northing: 0.000000

Planar Coordinate Information
Planar Distance Units: meters
Coordinate Encoding Method: coordinate pair
Coordinate Representation
Abscissa Resolution: 0.000000
Ordinate Resolution: 0.000000

Geodetic Model
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
_________________

Bounding coordinates
Horizontal
In decimal degrees
West: 10.362326
East: 12.504936
North: 47.129382
South: 45.640333
In projected or local coordinates
Left: 606088.187500
Right: 766033.625000
Top: 5220491.203121
Bottom: 5059756.878740

I can see the map with the two layers, but the borders don't coincide. (layer 1 represents municipalities, layers 2 represents the provinces where those municipalities are located)

I also changed layer 2 in GCS_WGS_1984 but I have still the same problem, that is, borders don't overlap.

2bis) layer 2

Horizontal coordinate system
Geographic coordinate system name: GCS_WGS_1984
Details
Geographic Coordinate System
Latitude Resolution: 0.000000
Longitude Resolution: 0.000000
Geographic Coordinate Units: Decimal degrees

Geodetic Model
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
_________________

Bounding coordinates
Horizontal
In decimal degrees
West: 10.387225
East: 12.478793
North: 47.093540
South: 45.674821
In projected or local coordinates
Left: 10.387225
Right: 12.478793
Top: 47.093540
Bottom: 45.674821

Is there anything else I can possibly do?
Thank you.
Giorgia

Hi Giorgia,

Approximately how far apart are the two datasets?

Melita

GB · ‎03-03-2011

Do you mean what the distance is between the two borders (of the two dataset) in the map? The length is approximately 220 Meters.
Thank you for your help.

Giorgia

MelitaKennedy · ‎03-03-2011

Do you mean what the distance is between the two borders (of the two dataset) in the map? The length is approximately 220 Meters.
Thank you for your help.

Giorgia

Hmmm, that could be a datum (geographic coordinate system) issue. However, the Monte Mario or Roma 1940-based zones for Italy have very different xy extents from a UTM zone. It could also be that the two datasets are at different accuracies. Can you find a 3rd dataset that you can use for a 'control'? That is, which dataset appears to be offset?

Melita

GB · ‎03-03-2011

Thank you very much for all your suggestions.

I used Roma_1940_Gauss_Boaga_Est and they don't overlap again.

a) 1nd layer (municipalities)

Horizontal coordinate system
Projected coordinate system name: Roma_1940_Gauss_Boaga_Est
Geographic coordinate system name: GCS_Roma_1940
Details
Map Projection Name: Transverse Mercator
Scale Factor at Central Meridian: 0.999600
Longitude of Central Meridian: 15.000000
Latitude of Projection Origin: 0.000000
False Easting: 2520000.000000
False Northing: 0.000000

Planar Coordinate Information
Planar Distance Units: meters
Coordinate Encoding Method: coordinate pair
Coordinate Representation
Abscissa Resolution: 0.000000
Ordinate Resolution: 0.000000

Geodetic Model
Horizontal Datum Name: D_Roma_1940
Ellipsoid Name: International_1924
Semi-major Axis: 6378388.000000
Denominator of Flattening Ratio: 297.000000
_________________

Bounding coordinates
Horizontal
In decimal degrees
West: -7.074194
East: -7.074177
North: 0.000395
South: 0.000383
In projected or local coordinates
Left: 10.385948
Right: 12.477436
Top: 47.091793
Bottom: 45.673069

b) 2nd layer (provinces)

Horizontal coordinate system
Projected coordinate system name: Roma_1940_Gauss_Boaga_Est
Geographic coordinate system name: GCS_Roma_1940
Details
Map Projection Name: Transverse Mercator
Scale Factor at Central Meridian: 0.999600
Longitude of Central Meridian: 15.000000
Latitude of Projection Origin: 0.000000
False Easting: 2520000.000000
False Northing: 0.000000

Planar Coordinate Information
Planar Distance Units: meters
Coordinate Encoding Method: coordinate pair
Coordinate Representation
Abscissa Resolution: 0.000000
Ordinate Resolution: 0.000000

Geodetic Model
Horizontal Datum Name: D_Roma_1940
Ellipsoid Name: International_1924
Semi-major Axis: 6378388.000000
Denominator of Flattening Ratio: 297.000000
_________________

Bounding coordinates
Horizontal
In decimal degrees
West: -7.074194
East: -7.074177
North: 0.000395
South: 0.000383
In projected or local coordinates
Left: 10.387225
Right: 12.478793
Top: 47.093540
Bottom: 45.674821

I decide to give up to these shapefile (dated 2006) and I tried the new version of these and Municipalites', Provinces' and Regions' borders coincide. Is there no way to modify the datum of the old shapefile, right?
Thank you.
Giorgia