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3 answers

QGIS gives different resolution basemap in Print Layout

I use tiled background map, from online source with 512-pix tiles and try to use it as background for printed map, using Print Layout and PDF export features. Problem: it seems that the choice of tile zoom levels depends automatically from the DPI…
JaakL
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8 answers

Is there an architecture for distributed geoprocessing?

Suppose I have 50 computers on my LAN. Each computer has a geodatabase for all parcel polygons in a particular state in the US. I'd like to write a geoprocessing task that finds all parcels valued over x $/acre that are within y feet of another…
Kirk Kuykendall
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24
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5 answers

Including variable in where clause of arcpy.Select_analysis()?

I am trying to loop through a shapefile, selecting each feature in turn and copying it to a temporary shapefile to by included in a union analysis. I'm using a cursor to find the ID name for each feature which I'm setting to a varible 'Name'.…
Flo Harrison
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Are there any general rules of thumb for selecting a transformation for Georeferencing?

There are several transformations that can be used when georeferencing a raster: 1st order Polynomial (affine) 2nd order Polynomial 3rd order Polynomial Spline... etc Are there any specific rules or rules of thumb, about which transformation…
Devdatta Tengshe
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24
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1 answer

Reading the names of geodatabase file layers in Python

I'm looking at New York City's Projected Sea Level Rise dataset. This dataset states that it is: Geodatabase of projected sea level rise based on models released by New York City Panel on Climate Change (NPCC). Data includes the 10th, 25th, 50th,…
Aleksey Bilogur
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24
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1 answer

Geopandas buffer using geodataframe while maintaining the dataframe

The objective is to create a geoDataFrame with buffered geometries AND with all the "attributes" of the original geodataframe. I am able to perform a buffer on my geoDataFrame using: gdfHybasBuffer =…
RutgerH
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24
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5 answers

Is it valid to have a properties element in an geoJSON featureCollection?

Is it valid to have a properties element with a featureCollection-element as parent? This is, according to geojson.org valid: { "type": "FeatureCollection", "features": [ { "type": "Feature", "geometry": {"type":…
stUrb
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24
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4 answers

Adding GeoPandas Dataframe to PostGIS table?

I have a simple GeoPandas Dataframe: I would like to upload this GeoDataframe to a PostGIS table. I have a Database setup with the PostGIS extension already but can't seem to add this Dataframe as a table. I have tried the following: engine =…
thecornman
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1 answer

What are Esri Geodatabases?

What are the various formats/storage technologies which fall under the name Esri Geodatabase? What are the most important differences between them? and (briefly) what are the mainstream means to utilize them? There are conversations all over the…
matt wilkie
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24
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4 answers

Splitting .tif image into several tiles?

I have an image of size 1GB (.tif), with the width and height 94000x71680. I would like to chunk this image into 20000X20000 tiles so that I can process them. How can I do this?
Anup Panwar
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1 answer

Seeking introductory books or articles about Open Source GIS for students coming from Esri background

I am preparing an intermediate GIS course for graduate and undergraduate students who have likely not been in touch with anything but Esri software. It is an existing course in the curriculum that I will be teaching for the first time. Currently,…
mvexel
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24
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4 answers

Save a WMS layer on your Hard Drive via QGIS?

Well, here's another question. I'm working on a set of WMS data right now and i wanted to know if you can save it on a Hard drive. I do know that you can save the current view as a georeferenced Tif, but considering the resolution i need and space…
Moreau Colin
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24
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8 answers

Seeking open source Geocoding tool which can be used commercially?

Is there any Geocoding tool which is open source and can be used in commercial application? We tried Google geocoding API's but cannot continue with it because of some licensing limitation. Now we are exploring GisGraphy but haven't finalized…
Ajinkya
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24
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1 answer

Create polygons of the boundary of a Raster in R

I want to create two polygons. One is of the rectangular extents of my raster. I know I can obtain the extent of the raster using r <- raster("band5.tif") e <- extent(r) plot(e) gives me this: How can I create ONE polygon of the boundary of the…
csheth
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Can File Geodatabase API be Redistributed?

Esri's file geodatabase API can now be used with GDAL/OGR - Link however each individual seems to have to login to Esri and download the API files individually. For example this is referenced in a blog post here and in the GDAL build notes. The…
geographika
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