[Qgis-user] Importing Cropland Data Layer

[Alex M]

For those following, Emily and I worked on the problem and figured out a
workaround.

CropScape claims to provide data in EPSG:102003, however on inspection
the data is actually EPSG:5070

My QGIS 2/3 on linux properly read it as 5070, however QGIS 3 on windows
on Emily's machine read it as 102003 for some reason. Changing that in
the properties puts the file in the correct place.

Thanks,
Alex

On 08/03/2018 01:52 PM, Alex M wrote:
> Yes added the tif file, tried, drag & drop, the Browser Panel, and the
> Add Raster menu.
> 
> In all cases it lines up correctly.
> 
> Thanks,
> Alex
> 
> On 08/03/2018 01:46 PM, Emily Wine wrote:
>> Alex,
>>
>> How did you import the Cropland Data Layer into QGIS? Did you just import
>> it as a tif file? And did it line up with the correct location on World
>> Imagery?
>>
>> Thanks,
>>
>> Emily
>>
>> On Fri, Aug 3, 2018 at 1:37 PM, Emily Wine <ehw38 at cornell.edu> wrote:
>>
>>> Alex,
>>>
>>> I added World Imagery by pasting this code into the Python Console:
>>>
>>>
>>> *qgis.utils.iface.addRasterLayer("http://server.arcgisonline.com/arcgis/rest/services/ESRI_Imagery_World_2D/MapServer?f=json&pretty=true","raster"
>>> <http://server.arcgisonline.com/arcgis/rest/services/ESRI_Imagery_World_2D/MapServer?f=json&pretty=true%22,%22raster%22>)*
>>>
>>> Thanks so much,
>>>
>>> Emily
>>>
>>> On Fri, Aug 3, 2018 at 1:33 PM, Alex M <tech_dev at wildintellect.com> wrote:
>>>
>>>> Ah, it changed in QGIS 3. How did you add the World Imagery?
>>>>
>>>> Your CDL file and one I downloaded worked fine for me in QGIS 2 and QGIS
>>>> 3.
>>>>
>>>> Thanks,
>>>> Alex
>>>>
>>>> On 08/03/2018 01:16 PM, Emily Wine wrote:
>>>>> Alex,
>>>>>
>>>>> I don't see any option to enable on the fly transformation. I've
>>>> attached a
>>>>> link showing what I see on my screen.
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Emily
>>>>>
>>>>>  crs project properties.PNG
>>>>>
>>>>>
>>>>> On Fri, Aug 3, 2018 at 1:03 PM, Alex M <tech_dev at wildintellect.com>
>>>> wrote:
>>>>>
>>>>>> On 08/03/2018 12:50 PM, Alex M wrote:
>>>>>>> On 08/03/2018 11:52 AM, Emily Wine wrote:
>>>>>>>> Hi everyone!
>>>>>>>>
>>>>>>>> I am completely new to QGIS (and mapping in general), and I can't
>>>> get my
>>>>>>>> layers to line up.
>>>>>>>>
>>>>>>>> * QGIS Version: 3.2.1-BonnStandalone-installerWindows 10 64-bit*
>>>>>>>>
>>>>>>>> *All of my layers are in the USA Contiguous Albers Equal Area
>>>>>> projection.*
>>>>>>>>
>>>>>>>> Currently, I have three layers:
>>>>>>>> Site Coordinates
>>>>>>>> World Imagery layer from ESRI
>>>>>>>> Cropland Data Layer (CDL) from USDA-NASS CropScape
>>>>>>>>
>>>>>>>> My coordinates line up perfectly with the World Imagery layer.
>>>> However,
>>>>>> the
>>>>>>>> CDL is floating somewhere out in the universe and won't line up.
>>>>>>>>
>>>>>>>> CDL Extent:
>>>>>>>> 48885.0000000000000000,2818725.0000000000000000 :
>>>>>>>> 117585.0000000000000000,2930685.0000000000000000
>>>>>>>>
>>>>>>>> I downloaded the CDL as a zipped file containing a .tif and a
>>>>>> .vat.dbf.tif
>>>>>>>> file.
>>>>>>>> I unzipped the file and uploaded it to QGIS as a .tif file.
>>>>>>>>
>>>>>>>
>>>>>>> Can you please provide a link to what you downloaded.
>>>>>>>
>>>>>>>> Is it possible that the georeferencing for the .tif file is encoded
>>>> in
>>>>>> the
>>>>>>>> .vat.dbf.tif file? How do I import the Cropland Data Layer to QGIS?
>>>>>>>>
>>>>>>>
>>>>>>> Nope, thats a value attribute database file.
>>>>>>>
>>>>>>>> Thanks,
>>>>>>>>
>>>>>>>> Emily
>>>>>>>>
>>>>>>>
>>>>>>> It's very likely that QGIS is just reading the projection data
>>>>>>> incorrectly. Check the Properties/Metadata tab for the layer to see
>>>> what
>>>>>>> projection QGIS assigned the layer.
>>>>>>>
>>>>>>> Was there a tfw with the data? that would contain georeference.
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Alex
>>>>>>
>>>>>> PS: Do you have projection on the Fly (OTF) enabled?
>>>>>> https://docs.qgis.org/testing/en/docs/user_manual/working_
>>>>>> with_projections/working_with_projections.html#define-on-
>>>>>> the-fly-otf-crs-transformation
>>>>>>
>>>>>> -Alex
>>>>>>
>>>>>>
>>>>>
>>>>
>>>>
>>>
>>
> 
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