Latest Contributions by CB

‎07-11-2017

Hello again and thanks for the help! I totally agree that clicking around is not optimal. Unfortunately this is what I usually have to do, given that my formal ArcGIS education consists of a one-week course (which I took three years ago). "Add Geometry Attributes" seems to have worked wonders! I selected "Geodesic area" and specified length "kilometers" and area unit "square kilometers". Now it gives me an area that seems to be very much in line with expectations. You are great!

‎07-11-2017

Thanks! So that was the problem.. Still, the results confuse me even more: I have to analyse the entire world, not just one section, so I chose the WGS_1984_Web_Mercator_Auxiliary_Sphere. When I click on a cell close to the equator it shows the proper area of about 3,000,000,000 (55km times 55km), but when I go far to the North the stated area increases about threefold... But it should be the other way around, should it not? The grids become smaller in the North, so it should give me a smaller area.

‎07-11-2017

Dear all, I have a grid with cells of 0.5*0.5 decimal degrees. I am aware of the problem that the cells change in size and would like to take care of it. Exporting my data with "Export Feature Attribute to ASCII" results in the above mentioned warning. Therefore, I followed the advice and used the "project" tool. I put in the dataset, selected the same coordinate system as before (GCS_WGS_1984), clicked on "preserve shape" and defined the maximum offset as 1 kilometer. However, I still receive the same warning as before. What do I have to do to receive an accurate result? Thanks a lot in advance!

‎06-01-2017

I don't have access to ArcMap at the moment; I hope this will change soon. For the moment I am limited to ArcGIS Pro. I helped myself with Raster to Polygon, but unfortunately this is not a solution as I need information for each seperate cell.

‎05-31-2017

Thank you for your continued support, and sorry for ranting earlier. I managed to get from raster to polygon with the Raster to Polygon tool. Intersect did the trick after forcing OIDs into the data with Copy Features. I checked it and apparently it merged them correctly. You have my gratitude! I just realised that now that I have to merge polygon data with countries, but I will wait with that until tomorrow; it's already after 7pm here. Hopefully this time it will be easier. Have a great day!

‎05-31-2017

Hi, thanks I just tried that too and it works somehow. I get a very nice image for the raster and I also get a proper fishnet. But I cannot attach the value of the cells in the raster to the fishnet. I also cannot use the raster to join my oilfield data (which is the reason I am doing all this). Can you tell me what I am doing wrong?

‎05-31-2017

Yes, that was it. Thanks a lot for this advice! Now it does something again. Unfortunately, I still cannot go on. I thought I could merge this with the raster by using OID. Unfortunately, the OIDs refer to different points, and no other variable is available in both sets. I really don't understand this: All I want to do is merge my oil fields (point data) with my sedimentary data (point data but refers to cells). But I can't even have the point data displayed in a cell. I just tried the Point to Raster approach; it gives me a nice immage, but it is just that - an image. There is no attribute table and I cannot get the data into a fishnet. And when I try to merge point data with grid data by right clicking on the grid data and selecting spatial join, all I get is this error message: Error executing function. Invalid SQL syntax[near "IN": syntax error] Failed to execute (SpatialJoin). My task seems like a fairly standard procedure; how can this be so difficult?

‎05-31-2017

I am not quite sure if I understand correctly. The coordinates cover the entire world; they range from -179.5 to 179.5 longitude and from -89.5 to 89.5 latitude. There SHOULD be the same amount of points and grid cells. After all, I created the grid with the points. However, since the update got installed, there are blank parts for the points in certain regions of the world; cells are shown, but no points. These blank parts have definitely not been there before the update. I thought it was just a bug - or a way to save memory. Since the update, when I click on the point data to join with the cells (the other way around has never worked), I get this result: Object ID: 1 Shape: point Join_Count: 0 Target_FID: -1 long:179,5 lat:89,5 sedimentary:1,3 PageName:<Null> PageNumber:<Null>

‎05-31-2017

Dear all, I open another thread, as the topic of previous one was about fishnet, which has now become obsolete - thanks again for the help. Background: I displayed xy-data of of data on sedimentary thickness for the world. I used Grid Index Features to turn the point data into a grid. However, the grid cells do not contain the value of sedimentary thickness anymore. So I want to merge the original point data - which has the info I need - with the newly created grid cells. For some reason ArcGIS refuses to spatially merge the grid with the points. However, it CAN merge the point data with the grid cell. That is until recently. For some reason now it creates just one observation. I do not know why. I have not changed anything. There was an update for ArcGIS, since then ArcGIS behaves strangely; maybe the update broke spatial join. I am using ArcGIS Pro. As I created the grid data from the point data the coordinates systems should be the same. If you like you can have a look, I attach the data below. I hope you can help me once more.

‎05-31-2017

I am sorry, as you know I am a complete novice. Let me clarify: I am using the trial version of ArcGIS Pro. I should also have access to ArcMap, but right now I am just using Pro. As it is the trial version, this should be the latest avaible. Three years ago was the last time I used ArcGIS. So a) I forgot most of the few things I knew back then and b) the interface looked quite a bit different. As I created the grid from the point dataset it pretty much has to be the same coordinate system doesn't it? Can I check this somehow? However, I just noticed something strange: When I click on a point - sedimentary or oilfield - it does not give me any information on that point. It just gives me the variable names, but no values for the variables. It just repeats the varible name where a value should be. So instead of "sedimentary 1.3" it says "sedimentary sedimentary". But when I open the attribute tables of the layers the info is there.. Edit: apparently ArcMap is NOT included in the trial version

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Date Last Visited	‎11-11-2020 02:23 AM

My Ideas

Latest Contributions by CB

Re: The input feature class does not appear to contain projected data.

Re: The input feature class does not appear to contain projected data.

The input feature class does not appear to contain projected data.

Re: From Point to Gird, fishnet does not work

Re: Spatial join broken

Re: From Point to Gird, fishnet does not work

Re: Spatial join broken

Re: Spatial join broken

Spatial join broken

Re: From Point to Gird, fishnet does not work