Latest Contributions by BenjaminHerrmann

‎02-01-2015

Chamged it anyways, since Todd's answer is actually what I was looking to do. Like you mentioned correctly, if people are reading through my question and have just that problem, Todd's answer will help them. In his answer, there is "like Melita said", so they'll go find what Melita said. I think this will help more people than what I did before. Otherwise people might not read all the answers and leave frustrated, opening another post on the same matter, wasting their own and the respondents' time, since they will already have answered the same question already. Anyways, I'll go do some measurements, now. Benny

‎01-30-2015

Ultimately, this is what I need to do. I need the data to be projected in UTM 19S and do measurements. Thank you very much for helping with this. Melita Kennedy‌, Xander Bakker‌, Todd Blanchette‌, all of you helped me very much and I would like to thank for this. It's a shame i can't mark more than one answer as the "correct answer". Since Todd, you based your answer on Melita's and she's done her best at understanding my predicament, I gave her the credit for it. I think you'll agree. Best and thanks again, Benny

‎01-26-2015

Melita Kennedy, I see what you mean (do you get a notification I answered on your comment without the @-mention?). The -14,xxx m are actually 14,xxx°S and respectively 66°E. Both values are in meters. But the projected coordinate system is already WGS_1984_UTM_Zone_19S and the projection transverse Mercator. How am I to change the CS to WGS84 when I appears to already be in that CS? From what you wrote, I understand that the extent of the shapefile is not consistent with the CS (or Projection or Projected CS, for that matter; I still have difficulties distinguishing between those three. I have to look that up.), I still struggle to understand how I should proceed. Should I not rather manually reset the extent of the the shapefile? Is that even possible? Do I need to use the "Spacial Adjustment" tool? Or should I change the coordinate system like you wrote? I'm sorry for the lot of questions, I'm a bit lost.

‎01-22-2015

thanks Xander Bakker‌ and Melita Kennedy‌. I will look into it next week and communicate my findings. Just by reading the answers I can't say if I will be able to get Arc to work the way I want it, but I'll try. Melita, to put it shortly, here's what I want to do: open a blank project. set the layers coordinate system to UTM_Zone_19S import an aerial photo define anchor points and read out the coordinates of those (can I do that with G-Earth when using it with UTM coordinates?) georeference that photo with anchor points create a new shapefile with line features (I have to look that up again, I don't remember how I proceeded the first time I did it) draw those line features (they're gonna be meandering paleo-river beds) measure the radiuses of the drawn lines (The basemap is not required, but I will eventually load it to see if the imported image was georeferenced correctly. In the end, I will need to have the coordinate system draw around my map and it would be nice if those coordinates were the right ones) Cheers, Benny PS: I attached a file which shows the extent of the unspecified_rivers shapefile That is a rather negative extent. What have I done? Have I pushed my rivers of the edge of the world?

‎01-19-2015

Hello community, I am a Geography student and very new to ArcGIS. Back in August I started a project which asked of me as one of the project tasks to map some paleorivers in Bolivia. So I got into ArcGIS a little and started the work. That worked pretty well and decided to work on other project tasks before continuing my GIS work. When I opened up my ArcGIS project again last week the features I created back then were all moved south of the south pole. Let's look at some screenshots. This is where the rivers and the reference image both map: south of the south pole (where the red cross with the "3" are) This is a zoom on the desired area. Clearly, there are no lines shaped here. Those are the lines I drew back in August. They match some paleoriver beds in the map above, but are not shown on the map any more. Look at the display scale, it reads "1 : 0,44" which means that they are displayed smaller than the feature in real life. Of course, this is rubbish, as the displays scale in the first image is 1:40'000. When I right-click on "Layers" and go to "Properties" and then "Source" everything seems correct. UTM Zone 19S is the required projection within which I was asked to work. I shouldn't change that. When I started in August, I opened ArcMap and opened the basemap layer, set the coordinate system of the "Layers" to UTM 19S and found some tutorial on creating a shapefile from scratch, which I followed and image 2 was the result so far, only that it was showing at the correct location back then. I don't really need any basemap that is provided in ArcGIS, though. The work I am doing requires me essentially to import an image into ArcMap, georeference that image in the right coordinate system, and then map the rivers on that image. Since that image is not any different from the utilised basemap so far, it would still be nice to know what went wrong. Here's more: This is what I obtain from a right click on "unspecified_rivers" > "Properties" > "Source" Data Source Value Data Type: Shapefile Feature Class Shapefile: D:\GIS_maps\San_Borja_RF\unspecified_rivers.shp Geometry Type: Line Coordinates have Z values: No Coordinates have measures: No Projected Coordinate System: WGS_1984_UTM_Zone_19S Projection: Transverse_Mercator False_Easting: 500000,00000000 False_Northing: 10000000,00000000 Central_Meridian: -69,00000000 Scale_Factor: 0,99960000 Latitude_Of_Origin: 0,00000000 Linear Unit: Meter Geographic Coordinate System: GCS_WGS_1984 Datum: D_WGS_1984 Prime Meridian: Greenwich Angular Unit: Degree Following an image on the image I should use: I georeferenced some points by right-clicking on the crosshairs and then putting in the X and Y-values I got from this Image: You can see on this image, that we are in the sector "19 L" at 743 km East and 8362 km South. Now, what I noticed is that as the longitudinal information may be correct, the latitudinal is measured from the South Pole, or more exactly 2000m south of the South Pole, because as you travel south, the numbers decrease but never under a value of 2000m. This is the link table of the control points as I entered them 2 hours ago: As you can see, the numbers match those in the Google Earth image and I entered the Y-coordinate with the negative algebraic sign, because I thought it measured from the equator. Still, I tried to flip the minus to positive in the link table and the reference image didn't really move anywhere north of the South Pole. Just ask, if you need any more information. In the meantime, I will start over and this time start with the reference image and then draw the lines. I am excited to see your answers. Please promote this thread to anyone you think might know what mistakes I made while working on this project. You may, of course, also only answer to one of the presented problems. Any insight is appreciated. Cheers, Benny

‎10-01-2014

Thank you Ian Grasshoff‌ for your help. The tool you scripted is useful, though it's usefulness is limited to me. I am working on a project covering several hectares if not sqkm. I use the tiles from BAG when I have clouds in the bing basemap and wanna see what's under it, but I do that very selectively as the tiles are not very big or if I want bigger tiles, the resolution diminishes rather quickly. So in short: I use bingmaps as basemap und use BAG when bingmaps just isn't showing enough.

‎09-26-2014

Hej Ian, I already came across this engine integration tool you linked to, but after reading the comments, I didn't consider even testing it any longer, since some users seemed not to be able to uninstall the add-on any more and had some notifications popping up every time they opened arcgis. Thanks for the article. I have already saved a link to that, too, but hadn't had time to read it yet. I'll do that today. Thanks for the explanations on the TOS, arc2earth and your tool. I'll keep those things in mind when testing the different tools. hang loose

‎09-24-2014

Thanks a lot Ian Grasshoff‌. I will look into it when I get back home. Got a few other options open at this time (arcGoogle, mapping.onphp.net, arc2earth), but this seems like the best option so far

‎09-23-2014

Hello, I have been trying to accessing the google maps servers and download georeferenced orthophotos as files directly instead of going to google earth, setting markers, taking a screenshot and then import it to arcGIS. Has anyone made experiences on accessing the image files from google (which, as I heard, should be accessible publicly)? I use arcMap 10.2 (or arcGIS 10.2, it's on the desktop PC, which isn't accessible right now and I don't remember the correct name...) Benny

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

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Latest Contributions by BenjaminHerrmann

Re: Shapefile displaced to south pole

Re: Shapefile displaced to south pole

Re: Shapefile displaced to south pole

Re: Shapefile displaced to south pole

Shapefile displaced to south pole

Re: Integration of maps from the google maps servers

Re: Integration of maps from the google maps servers

Re: Integration of maps from the google maps servers

Integration of maps from the google maps servers