Latest Contributions by ShuhongYan

I want to merge multiple zip code areas into one polygon in arcgis desktop. After merged, there are multiple silvers and lines within this polygon. I tried to use "Eliminate" tool to remove the silvers and lines but didn't work. Is there anyone knowing why this happened and how to solve this issue? Really appreciate your help! Thanks, Shuhong ... View more

Hi, I am not very familar for spatial analysis knowledge. I have around 30 wells that collected sample Chloride concentration data and I want to create a contour map based on these sample data.  Does anyone know a better way to create this contour map? I know Kriging is the best way, but I only have 30 points data which is too few for Kriging.  Any other interpolation method recommended to replace Kriging like IDW, or natural neighbor? Or any way to add more sample data technically based on 30 sample points so that Kriging can be applied? I have Spatical Analyst and 3D Analyst license in ArcGIS Desktop. I also heard of Geostatistical analyst tool, but even  thought I can understand the analyzed result in the tool or transform the sample data, I think the number of sample data is still the problem. I think it's a normal situation for lots of people since it's difficult to acquire over 100 well data in a small study area. Any help would be really appreciated! Shuhong ... View more

My company is using ArcGIS Server 10.5 and now it is not working well. When I tried to visit the url of a map service/feature service, the url jumps to a log in related url automatically. The web page is blank and keeps refreshing without final results. All the maps created on Portal for ArcGIS have no content and no map layers are available.   For example: The original url is: https://esriweb.companyname.com/companygis/rest/services/Common    It’s changed into: https://esriweb.companyname.com/companygis/login/?returnUrl=https://esriweb.companyname.com/companygis/rest/services/Common Anyone knows what's the reason for this issue? Any help will be appreciated! Thank you! Shuhong ... View more

Hi, My client sent me an excel file with XY data not in Lat Long format, but in XY Coordinates (e.g. x= 1705962, y = 12257736) and wants me to plot it in the arcmap with satellite imagery as basemap. How could I work on it? I imported this Excel file to ArcMap by using File --> Add Data --> Add XY Data and then specify the XY fields. However, I don't know the Coordinate system. It did plot my data in the arcMap, but it is not matched with the Basemap. I tried to use Define Projection to set up a Projected Coordinate System to it, but I don't know which one I need to use. I tried UTM or NAD 1983 in Projected Coordinate Systems but the result doesn't match with the basemap. What should I do to plot the data in the Excel file overlaid with the basemap? Should I ask my client which Coordinate System they are using for the XY Coordinate? I would really appreciate your help! Shuhong ... View more