Latest Contributions by JimCousins

I should provide a link to my source for the information that I have: Link to publication: http://downloads2.esri.com/support/documentation/ao_/710Understanding_Map_Projections.pdf ... View more

What I am actually seeking is a citation that I can use in a publication. Something along the lines of: Environmental Systems Research Institute. Understanding Map Projections. Redlands, CA, Environmental Systems Research Institute, 2000.    The basic form for a book citation is: Last Name, First Name. Title of Book. City of Publication, Publisher, Publication Date. I am uncertain that ESRI is the publisher, and of the date. Copyright is for 1994 - 2000, so should the publication date be 1994? I was hopeful that someone had used a reference to this in a paper, and could share their citation for this. ... View more

If you just need the imagery at a specific extent and scale: display only the imagery in data view, set the view area appropriately, and choose FILE >> EXPORT MAP >> select png or another image format, and in the following dialog box, select WRITE WORLD FILE. This will create a georeferenced snapshot of the imagery. If you need to zoom in and out and maintain image quality, I am afraid I can not help you other than to say to find another source. Regards, Jim ... View more

If this value is meters, the feet equivalent will be larger. If you are uncertain of the units, the meta data should indicate the vertical units. If there is no metadata, add the USATopo layer to your map and compare the values of the raster to the contour values of the topo. If you are sure of the vertical units, why not simply use the raster calculator to multiply by the correct conversion value, and use the resulting raster instead of the original? Regards, Jim ... View more

Image date: simply use the info tool on the image to get the date information. Be aware that different tiles may have different dates. For imagery that is taken on a frequent basis, you would probably need to look into sattelite imagery, and I do not know if the resolution would meet your needs. If you need infrequent images, terraserver may meet your needs, although you will need to pay a nominal fee to search and view imagery, and a fee to acquire it. Regards, Jim ... View more

Do you have a license for Adobe Acrobat? If so, try printing to pdf instead of exporting. If not, what is the resolution you are using? Are you setting a background color? This will cause rendering of the entire page, so setting it to null may reduce the output size. Do you have layers and / or attributes enabled under the advanced settings? Is the background a raster? can you resample it to reduce file size? Regards Jim ... View more

There was not a mention of anything like this in your post, and this is a bit vague. Could you be more specific about your comment and just what it is you wish to do? Jim ... View more

A few comments: You need to use a variable to return the value, not the column name itself You need and End If at the end of your code After the Else statement, you need to also use the same variable to return the 0 value I am assuming that you are using the code block for the field calculation. set the Expression  = result in the code block (I created fields from your table snapshot) If [species] = "Pinus" and [class1] = 1 and [condition] ="G" then result = [ITID] elseif [species] = "Pinus" and [class1] = 1 and [condition] ="M" then result = [ITID] elseif [species] = "Pinus" and [class1] = 2 and [condition] ="G" then result = [ITID] elseif [species] = "Pinus" and [class1] = 2 and [condition] ="M" then result = [ITID] Else result = 0 End if ... View more

I do not have a file of that size to test with. Smaller files (@ 100mb) convert without issues. Regarding reducing the number of rows and columns, you can not do this without loss of image quality, as this is a resampling function, and will create cells at a larger size to reduce the row / column of the image. Is the entire image needed? If you can crop the image, you will retain the original resolution / quality, and reduce the number of rows / columns. Another possibility is to split the image into more manageable pieces, and then work with those instead of the entire source all at once. Regards, Jim ... View more

Try putting your variables in quotes. Code example from buffer help: import arcpy arcpy.env.workspace = "C:/data" arcpy.Buffer_analysis("roads", "C:/output/majorrdsBuffered", "100 Feet", "FULL", "ROUND", "LIST", "Distance") Regards, Jim ... View more

Irene,   Your code is displayed on a single line, making it almost unreadable. Please see the link provided to post your code in a formatted manner. https://community.esri.com/people/curtvprice/blog/2014/09/25/posting-code-blocks-in-the-new-geonet?sr=search&searchId=5ea9a5fb-f953-4254-8964-d69d63c5a0eb&searchIndex=2  Regards, Jim ... View more

Could you be more specific? What does "I went to Google Earth and created a point file and converted to a shape file, extracted a Contour map"   mean? when you create a point file and convert to shapefile, what are the attributes? Why are you using Google Earth?  Do you have ArcMap? If so, what version and what license level do you have? ... View more

Have you explored pasting as an enhanced metafile? I find that these are pretty clear. ... View more

Hello, Jessica.  Yes. When you add your image file (jpg) to the map, it should show up in the georeferencing toolbar as the image of interest. If not, use the drop down menu to select it. Set your map extent to the approximate area of interest, and then use the drop down menu for "Georeferncing" to select "Fit to display". This will put your non-georeferenced image in the general vicinity of the correct location, and from there, you can add control points to place it correctly. Regards, Jim ... View more