topic Re: Making Maps on SAS in Graphics Programming

Re: Making Maps on SAS

zaldarsa — Sun, 07 Nov 2021 22:27:00 GMT

Hi,

I am using SAS 9.4 through my university's portal system, Apporto.

Making Maps on SAS

zaldarsa — Sun, 07 Nov 2021 21:38:57 GMT

Hello!

I would like to make a map of the world indicating where all the participants in my study were born. I stumbled upon the proc GMAP procedure, but I am a bit confused on how to use it. I tried the following code but it didn't work. The following error message appeared:

PROC GMAP MAP=merged
DATA=merged;
ID W_d_country;
CHORO w_D_country;
RUN;

Thank you in advance for your help!

Re: Making Maps on SAS

FalkoSchulz — Sun, 07 Nov 2021 22:16:46 GMT

Hi, you posted this in the SAS Visual Analytics forum - can you quickly confirm what SAS environment you use? If you do use SAS Visual Analytics then creating geographical maps is just a matter of loading data in your environment and drag one of the geo objects (e.g. Geo Region) to the report canvas and assign roles. If you do use a programming environment - we may have to move this discussion to the appropriate forum.

Thank you! Falko

Re: Making Maps on SAS

FalkoSchulz — Sun, 07 Nov 2021 22:39:59 GMT

Thank you. I have moved your question to the Graphics Programming forum - I'm sure folks here can better help you with using PROC's in order to create geo maps.

Re: Making Maps on SAS

FalkoSchulz — Sun, 07 Nov 2021 22:42:28 GMT

Also - you mentioned - you have seen an error message using PROC GMAP but you did not include that in your original post. Can you share more details on what exactly didn't work?

Also wanted to share the official doc for proc gmap in case that is helpful https://go.documentation.sas.com/doc/en/pgmsascdc/9.4_3.5/grmapref/n1rfysveimrpeon1gw5c8grv4hgs.htm - there are plenty of additional examples to get started.

Falko

Re: Making Maps on SAS

DanH_sas — Mon, 08 Nov 2021 14:22:11 GMT

I think you would find this easier to create using PROC SGMAP instead of PROC GMAP. To create your example, I would probably overlay a SCATTER plot on an OPENSTREETMAP. The code would look something like the following:

proc sgmap plotdata=birth;

openstreetmap;

scatter x=lat y=lomg;

run;

Hope this helps!

Dan

Re: Making Maps on SAS

GraphGuy — Mon, 08 Nov 2021 17:56:42 GMT

Do you want to plot markers on the exact lat/long where they were born, or do you want to color the countries where they were born?

Are there any other specific things you'd like to do in the map?

Re: Making Maps on SAS

zaldarsa — Mon, 08 Nov 2021 21:25:14 GMT

Hi!

I would like to color the countries of birth. I would like to make a map like this one, except without dots on the map.

https://www.ncbi.nlm.nih.gov/core/lw/2.0/html/tileshop_pmc/tileshop_pmc_inline.html?title=Click%20on%20image%20to%20zoom&p=PMC3&id=5837706_dyw056f1.jpg

Re: Making Maps on SAS

GraphGuy — Mon, 08 Nov 2021 22:43:29 GMT

Here's a similar example I created, using Proc Gmap:

http://robslink.com/SAS/democd99/visa_overstay.htm

And here is the SAS code (there are several different ways you can control the color, using numeric or character data):

https://robslink.com/SAS/democd99/visa_overstay.sas