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How can I calculate a gain and loss area of vegetation land having two different lines that represents vegetation in different years. Edit: There are two polylines, one represents the edge of vegetation of a forest in 2010. The other one the edge in 2007. I need to create a polygon of...

التوزيع المكاني للمنشآت السياحية في مدينة المكلا. " دراسة جغرافية باستخدام نظم المعلو أكثر...

This may sound dumb, but how do you zip a personal geodatabase in order to import it to ArcGIS online?Are there other ways to import the geodatabase, different from the one below? The ArcGIS Online fails to add a zipped “file geodatabase” There is the "share as" option in arcmap 10.1 but it's...

I trying to consume my custom Print Service in a web application and I keep getting the error "...Unable to connect to map server at https://domain/arcgis/rest/services/foldername/layername/MapServer." This only happens when I have a layer turned on in the web application. The print service...

This tutorial covers export options from QGIS to DXF format. Troubleshoots potential problems and provides work around in case export fails. This process comes in handy when needing to edit or manipulate linework in a program outside of GIS. Once in DXF format, data can be plotted to PDF or...

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ArcGIS Tutorial Arabic.pdf محتويات هذا الكتاب على الشكل التالي بالتوفيق للجميع 1 Spatial Analyst Tutorial 2 Spatial Adjustment Tool Tutorial 3 Network Analyst Tutorial 4 ArcScan for Arc GIS Tutorial 5 ArcGIS Publisher 6 Editing annotation 7 ArcReader 8 Survey Analyst Tutorial 9 Using Maplex for...

I am writing a plugin for QGIS (v2.12).There have been quite a few similar questions on this forum, but they don't seem to work for me. my plugin does the following: get the vector layer check that it is a line shape file. get the raster layer look at the vector layer, if there isn't a...

Read through the previous post how to find close and parallel lines but still looking for a simpler solution. Found several ArcGIS forums post on the topic but no answers there either. It seems likely a tool exists in ET GeoWizards, ArcToolbox, or QGIS that will select only parallel lines (with...

I am new to QGIS, I have been using ArcGIS for most of my maps. I have two layers that are not overlapping properly. One is a shp file from a GIS clearinghouse and another from a delimited text source that I created myself. I am using the same CRS for the delimited text source as the shp file...

I have a project where I have a few layers (State of Texas, cities, roads, etc.). They are all resaved and projected to NAD83 / UTM zone 14N EPSG: 26914. The project CRS is also NAD83 / UTM zone 14N EPSG: 26914 and on the fly projection is enabled. I added a text delimited file and cannot get...

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I'm not able to run a very simple query to return the bounding box of a table in another SRID. I'm doing something stupid, because it is a really simple query. When I run the query with the composition ST_Transform(ST_SetSRID(ST_Extent())) the conversion gives me wrong results. Maybe the problem...

I am new in remote sensing field.I sometimes got confused when I read about image pre-processing.Can someone please elaborate to me the difference and some example methods to do radiometric correction and radiometric calibration ? Is converting DN values to Top Of Atmospheric (TOA) reflectance...

I'm using ArcGIS 10.1 (SP1 for Desktop) and when I'm exporting my attribute table to a dBase format, it will export some but not all the rows. There is no error message indicating anything has gone wrong. I only notice it when I'm opening the table in Excel. I've been experiencing this issue...

I'm a QGIS user running v2.0 (Dufour) on Mac OSx10.8.5. I have some data in .gdb format and need to access this and work with it in QGIS. I'm a relatively savvy computer user, but not at all a programmer or developer. I've been reading the forums and have seen some steps outlined for GDAL...

I have about 50,000 linestrings in PostGIS. They represent routes along roads. But I want them to be (roughly) pavements (aka sidewalks) instead. So I need to move all the lines 3 metres to the left of the direction they are travelling. I found this function...

Synthetic-aperture radar (SAR) imagery is playing an increasingly critical role, underpinning a range of applications in the environmental management and monitoring space. Understanding SAR data, available processing techniques, and its array of uses together help to realise the power of this...

Goal: Move address points to their correct location. Plan: I have a layer of AddressPoints of which some need moved to a new location. I want to take a line layer (called AddressPoints_AdjustLocation, shown as a purple dashed line below) and draw a line from the address points current location...

Bonjour, Je suis actuellement sur un travail universitaire qui vise à faire un état de l'art sur l'état actuel du marché de la donnée. Cela passe par ses tendances et ses prix. Je m'attendais à trouver sur une littérature abondante, ce ne fût pas le cas... Auriez vous quelques pistes sur les...