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I have a set of polygons in a single esri shapefile. I want to create a regular point grid with equal spacing (for example 1 unit) inside each of this polygons and should be able to find out for each point where it lies ie: inside which polygon. How can i do that with R. here is how the polygons...

Postgresql doesn't support Primary Key in views.When I load a postGIS view in QGIS "manually", I can choose the column that will be the Primary Key, but I would like to know if I can select a column as Primary Key when I load it using pyQGIS script. Thank you. أكثر...

This course is the fifth in the “Geographic Information Systems Fundamentals” series. This installment covers how to geocode addresses in ArcGIS, the basics of geoprocessing, and the use of ArcGIS Online for collaborative mapping and processing. أكثر...

لو سمحتم محتاجه كتب عن الجغرافيا الطبية وانا من جامعة طنطا ومعظم الكتب والرسائل فى جامعة المنيا ... من فضلكم ساعدونى أكثر...

I am trying to create a user, say dev, for cartodb running in local machine. When i run the script create_dev_user sh script/create_dev_user dev It produces this RuntimeError: ERR unknown command 'HMSET' error. I am on ubuntu 10.04. أكثر...

So far, a GIS has been described in two ways: 1) through formal definitions, and 2) through its ability to carry out spatial operations, linking data sets using location as the common key. You can, however, also distinguish a GIS by listing the types of questions it can (or should be able to)...

By Gayle Hubert I discovered a few years ago that I’m a sixth generation resident of Platte County, Mo. I was living in a house unknowingly within five miles of where my third and second great-grandfathers are buried. It’s funny how we end up going back to our roots. My family’s roots grow...

By Kacey Fitzpatrick It’s summer blockbuster season and you know what that means—get ready for action packed movies about superheroes, robots, and genetically-modified dinosaurs. What does that have to do with this blog? It all starts with science! Before you head out to see the latest...

All, I wanted to see what the best way was of calling the geometry service to carry out a Buffer operation on ArcGIS Server 10, without using the SOM. Ideally I want to consume the REST API, using a wrapper so that it was easy to call from c#. Is the GISClient the way forward? From what I...

This short videotutorila shows how to turn a GeoTIFF image into a TIFF picture with worldfile within QGIS 2.8 أكثر...

من مدة ليست بالقصيرة، فقط 840 عام بدأ برج بيزا في الميلان، ومن الطبيعي الافتراض أنه لن يستطيع أن يتحدى الجاذبية الأرضية إلى الأبد وسوف يسقط يوما ما! هل عجزت الهندسة عن حل مشكلة ميلان إحدى أجمل عجائب العالم؟ إلى متى سيصمد البرج الذي بميل 4.5 م عن محوره؟ برج بيزا المائل مبني من الرخام الأبيض على...

i have trouble coloring the polygons in my layer based on the values in certain field in another table in my postgresql database that is different from the attribute table of the layer itself , is there any way to do this ? note : i am working on decision support system that is using key...

I am working with QGIS 2.6.1 by adding data from server using PostGIS. Now, I want to see the attribute information. So, how can relate the spatial with the information? Thanks for your interest to help me. Best أكثر...

My model builder append line in my output layer. how to calculate field for only this new generated feature however everything goes fine but model builder calculate field for all feature in Output layer Note: I am running model builder selecting features from appropriate layer...

i'm looking to change the cursor of ol3 during drawing from blue circle to crosshair, i've tried this answer, but it changes only OS cursor not ol3 cursor, is there any idea ? أكثر...

I have georeferenced some images (ArcGIS -> Update Georeferencing) which creates a *.tfwx file with the new parameters for georeferencing. I renamed it to *.tfw but QGIS is not able to read the georeferencing information. Does anybody has any useful tips how to fix this? أكثر...

I have published few map services in which I directly publish on server and for remaining services I have created service definition file. All services are working fine but what exactly difference between "Publish a service" and "Save the service definition file" ? . In case "Publish a...

نظراً للطلب المتزايد على الحديد المسلح في البلدان النامية، وعدم توفر الأساليب اللازمة لتصنيعه محلياً وسد حاجتها، قام مخبر سنغافورة للمدن المستقبلية Future Cities Laboratory باقتراح بديل لحديد التسليح ألا وهو القصب أو الخيزران أو ما يعرف Bamboo. حيث تعتبر الوفرة والديمومة إلى جانب مرونة البامبو...

I'm having a hard time substracting 2 raster with ArcObjects sdk 10.1. I keep getting a nullreference exception at the gp.execute() method, but I can't figure out where the problem is, I recall setting other arguments to nothing in the past so don't think this would be the problem I'm using...

I downloaded satellite images but mtl files were not in the zip. I searched a lot but i dint get from where to download mtl files. I need to convert radiance to temperature in both L7 and L8 images. Thanks. أكثر...