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Another fantasy story featuring maps, Charlotte Ashley's "Eleusinian Mysteries," appears in this month's issue of Luna Station Quarterly. In it, a Javanese-Dutch mapmaker named Maghfira is punished for making maps of the moon that include a seemingly fanciful feature: a city named Eleusis...

In the past I've used materialized views in Oracle to replicate non-spatial data from one database to another. I'd like to do the same thing with an SDE feature class, but I'm wondering how that will work at the SDE level. I've tried creating the view with a simple CREATE MATERIALIZED VIEW...

I am working on a project in which data points are often at the same location (e.g. Rome). This poses a problem because the data points then overlap and cannot be clicked on. I found some SQL at http://bl.ocks.org/andrewxhill/8695515 that scattered the points very well when I applied it to one...

I have downloaded a zipped folder containing multiple .adf files with elevation data from http://viewer.nationalmap.gov/. I want to create a 16 bit grayscale heightmap (tif) from the downloaded files - what is the simplest approach to do so? The resulting tif file does not need to be...

I have ArcGIS Desktop 10.2 and my challenge is how to extract the of number vertices in each polygon for all features like this: I have many parcels in my feature class and I want to extract the number of vertices for all features separately, then I want to display XY coordinates for all...

Map layout with ArcGIS 10.2 أكثر...

I've recently updated my ol version from 3.4 towards 3.9 I have a dragandrop layertree which basically gets the current position of the layer, removes it and inserts back in the new position using: map.getLayers().insertAt(newIndex, layer);this works great on V3.4 for both (bingsmap/google and...

I know there already are posts about this subject, I tried to derive a solution for my own problem but the code for field mapping is very complex to me. I have a Raster 100x100m and point layers that I want to join using a python script. I need the SUM of a field called "weight" (point layer)...

I have a polygon shapefile in ArcMap 10 made up of several vertices/line segments. I need to convert some but not all of the sides of this polygon into arcs. Is there a way to do that without having to redraw the shape? I don't have many other programs available so I'm looking to avoid having to...

Bonjour à tous, j'aimerai savoir comment développer un websig avec le volet de mise à jour des données. En fait à la fin de mon travail je suis sensé avoir une interface présentant des informations géographiques (réseaux hydrographique et routier, infrastructures et limites administratives) et...

Bonjour, voici mon problème: je dois extraire les tête de bassin versant à partir d'une image SRTM, j'ai suivit toute la procédure dont le calcul de la direction des flux, l'accumulation des flux, l'ordre des cours d'eau (Strahler) et la pente en mode raster. Maintenant selon la définition...

TweetA webinar tip from esri… learn how to add apps to your maps and more! From Esri… Add Intelligence to Your Apps & Maps with Rich Data from Esri’s GeoEnrichment Service. Learn how to take advantage of Esri’s GeoEnrichment Service. Add authoritative demographic, business, and landscape data to...

I have to reproject an image programmatically in c# using gdal library.For the moment i'm a little bit lost in gdal and i don't really now which methods i have to use.I think i will have to calculate tie points, set reference systems and then reproject but i don't now how to manage this. Can...

I have a GRD-File where all pixelvalues which are less than 0.05 should be converted to nodata. I know how to do this with ArcMap, but the process should be done automatically, for example with cronjobs. Is there a possibility to do that with gdal (maybe gdal_warp or gdal_translate)...

I am working with this query SELECT ST_MakeLine(route.geom ORDER BY seq) as test FROM (SELECT * FROM pgr_fromAtoB('way',48.24287652969359,33.85220534163203,48.24991464614867,33.85092228417727 )) As routethe above query returns a null cell,I tried SELECT * FROM...

I have a dataframe in ArcMap with contour lines and a vector layer. Now I want to place contour line labels only at places beside the polygons of the vector layer. How is that possible? I already tried several combinations for the feature/lable weights but either the lable conflict with the...

Bonjour, voici mon problème: je dois extraire les tête de bassin versant à partir d'une image SRTM, j'ai suivit toute la procédure dont le calcul de la direction des flux, l'accumulation des flux, l'ordre des cours d'eau (Strahler) et la pente en mode raster. Maintenant selon la définition...

الــدورة التدريبيـــة / تنميــة مهــارات مسئــولي المشتريــات والمخــازن بـــداً مـــن 1 :10 نوفمبـــر 2015م في كوالالمبـــور _ ماليــزيــــــا... أكثر...

I have got two existing rasters that have the same cell size (5x5m). The corner of cells from raster A are located exactly at the centres of cells in raster B. I want to place raster B exactly on top of my raster A. I have tried these options: the tool 'resample' on raster B, while...

This is a very brief overview of geodetic systems. I needed to define this so I could start talking about orientations of north. Enjoy. PS there is not much of an ending, so sorry about that. I will continue on this topic in later videos! أكثر...