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1500 questions
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15 answers

Permanently reordering fields in data (shp, gdb) without using FME or another ETL tool

If I have a shapefile or geodatabase featureclass that has fields that I want to permanently reorder, is there a tool, script, or utility that will help me quickly accomplish this task? Generally I know you have to create a new field, then populate…
RyanKDalton
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3 answers

How can I get the proj4 string or EPSG code from a shapefile .prj file?

I have to work with a shapefile defined in an unusual projection, which my GIS software does not know about. How can I get the proj4 definition or the EPSG code for the projection?
rudivonstaden
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24
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2 answers

Counting Points in Polygon with PostGIS

I've got a simple problem: I want to count the number of points within a set of polygons. I have a SQL already but it only gives back the gid of the polygone that actually contains points. My tables: a polygon layer with 19.000 rows and a point…
hoge6b01
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24
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6 answers

Making GIS inventory using ArcPy

My office will be seeing a big change in its GIS section. This section has been operational since the 1980's and has a huge collection of GIS data (i.e., shapefiles, raster files, data, etc) but never been through any inventory. Now it will happen.…
blu_sr
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24
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5 answers

How to Split Features in QGIS?

I am new at using QGIS. How can I simply split features in QGIS? The manual tells to simply draw a line through the polygon you want to split. But it doesn't work. The line disappears when finishing it. When I select the polygon and then split it,…
Hendrik
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5 answers

Database for offline slippy map tiles

I currently have an offline HTML5 map application (built on Leaflet & KendoUI with custom additions) that has an app manifest and works fine on multiple platforms. However, I am hesitant to use the manifest to store the actual map tiles this way(PNG…
Dr.YSG
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24
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2 answers

Getting list of selected features in ArcGIS for Desktop using Python code?

I have a question regarding selections in ArcGIS for Desktop. Assumed I have one layer in ArcMap and I have selected two of five features. Is it possible to get a list of all selected features by using Python? It would be fine if there is a way to…
Sven
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8 answers

How are you, as GIS professionals, spending most of your day at work?

I've pondered for a while whether I should ask this question. I even asked whether I should ask a question that should probably be a community wiki on the meta site. Since I didn't get many responses, and the one I did get didn't really…
Fezter
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4 answers

Extracting elevation from .HGT file?

I want to assign a specific long/lat position on a map to the elevation from SRTM3 data files, but have no idea how to find the specific value. So I want some example of how I can find in N50E14.hgt elevation to 50°24'58.888"N, 14°55'11.377"E.
MartinS
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24
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5 answers

Importing coordinate data from Excel into QGIS

I have an Excel file containing data collected over many years as latitude and longitude coordinates for archaeological sites. How can I import it into QGIS as a new layer?
Bill
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24
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10 answers

Sorting by multiple fields at same time in QGIS?

Is it possible to sort multiple fields at the same time in QGIS? For example, I'd like to sort a table by state name, and then within each state, sort by county name. This would be the same as the Advanced Sort option available in ArcMap.
Stu Smith
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24
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3 answers

Seeking Generalisation Strategies for Building Outlines in PostGIS?

I have a dataset of building footprints vectorised from a raster dataset. The dataset is currently just a vector representation of the raster data. I would like a polygon dataset that only has vertices at the corners of the building. I have…
Matthew Snape
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24
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4 answers

Offline tiled map web app

I'm not sure whether to post this here or on Stackoverflow, as it's sort of a crossover. Let me give it a try. In the proposed HTML5 standard, there's the option of storing web application data in a local cache using a cache manifest. I am looking…
mvexel
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24
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5 answers

Copying domain (and only domain) between Esri geodatabases?

Sometimes I have the need to copy a domain(s) from one geodatabase to another (without the featureclass or table). In the past, I have accomplished this in a few different ways, but each method is not as straightforward as I think it could be (or…
Jay Cummins
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1 answer

Seeking tools for regionalization/redistricting?

I am looking for tools for regionalization / districting in GIS. So far I have been able to identify Districting ArcGIS extension (now also online) REDCAP (currently limited to 50k input polygons) iRedistrict (not yet released) R method Is there…
radek
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