A vector data storage format for storing the location, shape, and attributes of geographic features. Often referred to as 'an ESRI shapefile', as ESRI developed it.

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1answer
97 views

Add multiple fields to attribute table by python, with a prompt window for parameters

I know how to add field to arcmap shapefile using Python: import arcpy arcpy.env.workspace = "H:\pythonexercise\NZL_rds\NZL_roads.shp" arcpy.AddField_management("NZL_roads", "LENGTH", ...
16
votes
6answers
6k views

How to improve rendering performance of very large shapefile?

I have a polygon shapefile that has a 100MB .dbf and 500MB .shp file component. The reason it is so large is it is a landbase classification for a whole district. Everytime I am viewing the file in ...
3
votes
1answer
283 views

Join CSV using gdal/ogr

I'm trying to use gdal/ogr to join a shapefile called myshape.shp with a csv called mycsv.csv. The join field in the shape in joinshp and the join field in the csv is joincsv. I've found this command ...
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0answers
118 views

How can I make PROC GMAP (SAS) run is less time?

I am trying to create a map of Australia, by Local Government Area (LGA), with shaded regions displaying the population for each LGA. The shape file can be downloaded from the Australian Bureau of ...
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3answers
3k views

How to convert projection

I got sample shape files with the following *prj file content: ...
0
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1answer
36 views

Filling Field2 to icorresponding values in Field1 of shapefile using Field Calculator of ArcGIS for Desktop?

I have to give explanation in a new field of the existing field which contains abbreviation. Example: Field "Geology" has values Q, Qs,N....(abbreviation), I have to give explanation of those in a ...
3
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1answer
405 views

How to count and rasterize polygon overlaps in QGIS?

I have a large number of polygons that are overlapping. I'd like to create a heat map and plan on using raster calculation to do this. My plan: to give each polygon a raster value of 1, and adding ...
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2answers
361 views

Converting *.kml file to *.lyr file so Google Earth can create spatial data to use in ArcGIS for Desktop? [duplicate]

Want to convert the .kml file into .shp file so that I can create new the point, line and polygons data to work in ArcGIS. Actually I want to use Google Earth to make data for ArcGIS.
0
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1answer
77 views

Creating a new shapefile based on an existing problematic shapefile

I have a large floodplain shapefile and would like to create a new shapefile based on coverage. I'm having major problems with the original (intersections and other errors) which I've been unable to ...
2
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1answer
1k views

Geodjango - trying to get points within a polygon

I'm going through the Geodjango tutorial and trying to implement in my own project - I have loaded data from a shapefile into my model/database and I have a separate model that has a PointField. I am ...
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2answers
150 views

How can I delete dangling paths after merging features

In my previous question I've asked how to can I merge different polygons while converting to GeoJSON and TopoJSON. After a day of researching I've realized that, rather trying to do it command line, ...
1
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0answers
64 views

How do I export only additions when running export-diff to a shapefile in geogit (geogig)?

I currently have two commits in my GeoGit (GeoGig) repository. I'm running the following command on the two commits to get the differences exported to a shapefile. geogit shp export-diff [commit1] ...
2
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1answer
232 views

Why is this .prj file causing the shapefile to render in meters instead degrees?

So I've got a shapefile that has polygons of countries, with coordinates in decimal degrees: Country (String) = Algeria POLYGON ((6.928073999999953 36.88360652, 6.949973999999969 ...
2
votes
3answers
919 views

How can I work with very large shapefiles (~1 GB) in QGIS?

I'm performing some basic spatial analyses on a large database of traffic injuries in California between 2003 - 2011. Because the dataset is large (nearly 1 GB of points), I'd like to first cut it ...
1
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1answer
83 views

Importing a Shapefile in SpaceStat with GeoTools [duplicate]

I've just discovered the GeoTools tutorial to generate a Shapefile from a CSV containing a list of cities. I've managed to make it work but when I try to create a new Geography in SpaceStat, importing ...
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3answers
4k views

How to add a field to a shapefile using R

This question is trying to make sense of a post that already exists that looks good, but is failing in practice. The second ranked answer uses the foreign package to read a shapefile attribute table ...
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2answers
220 views

Reduce shapefile to outline

I have a shapefile consisting of 10 contiguous polygons. I want to reduce this to a single polygon encompassing the entire area of the existing 10. I don't need to retain data. I've googled but ...
1
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1answer
534 views

Recovering shape layer which was accidentally overwritten?

I duplicated a layer set, as it was more convenient (same style and attributes). It was working fine and both the original and new layers were showing. Then I open it up another day and the original ...
0
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1answer
82 views

Adding a Vertex To Exisiting Feature(linear) Using OGR Python

I am working on a project that involves finding the intersection of linears in a shapefile, if that vertex(the found intersection) doesn't already exist for each(or one) of the features, then that ...
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2answers
487 views

Select Layer by location does not work

I am having trouble using the "Select Layer by Location" tool. I want to select everything from shapefile A (green) that overlays with Shapefile B (red). Here is the raw data: And one example of ...
5
votes
2answers
998 views

How does shp2pgsql define schema?

Can anyone explain how it is that the shp2pgsql loader for loading shapefiles into PostGIS goes about defining the schema for a table when importing a shapefile? To further explain, shapefiles are ...
1
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1answer
57 views

Setting the Geometry with sql query

I am trying to merge data from a U.S. states shapefile with data on each state. I used this SQL query which is supposed to work: SELECT * FROM child_poverty_by_state UPDATE child_poverty_by_state ...
3
votes
2answers
6k views

How to convert data from a .gdb into a shapefile without ArcMap?

I have a .gdb folder with LOCK Files, FREELIST Files, ATX Files, GDBINDEXES Files, GDBTABLE Files, GDBTABLEX Files and, SPX Files. I want to convert the parcel data within this folder into a ...
1
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1answer
894 views

How can I convert WKT to SHP?

Using ArcGIS, ArcInfo and fme, I would like to transform data which contains wkt geometries (points, lines and polygons) into SHP. Has anyone a workflow for doing such a transformation?
2
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1answer
179 views

How to convert xml into readable gis format

I have data in xml format which contains a child element "GEOM" which has coordinates in the following format POINT (9.9632253030540205 52.9569277022282421) POLYGON ((9.7423702151211078 ...
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2answers
13k views

Adding shapefiles to PostGIS database

I was able to create a Postgresql database and then I executed, createlang plpgsql geospecies psql -d geospecies -f postgis.sql psql -d geospecies -f spatial_ref_sys.sql So now can I directly ...
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0answers
70 views

how to create a shapefile containing attributes from a list?

I have a list of features and each feature is a dict in that list. following you can see the structure: [ {"FID": 0, "Shape": polyline, "Nodes": [0,1]}, {"FID": 1, "Shape": polyline, "Nodes": ...
2
votes
1answer
44 views

OGR DeleteDataSource not working properly in Python

I have a small Python script which is supposed to delete a shapefile in case the file is empty. import sys from osgeo import ogr drv = ogr.GetDriverByName("ESRI Shapefile") ds = drv.Open(inData) if ...
0
votes
1answer
833 views

How to convert *.shp files to *.gmt format type files?

I am new at using GMT (Generic Mapping Tools) and I am wondering if it can use a shapefile of a hydrographical network. Can I perhaps change my .shp to .gmt format and combine it with a GMT map? If ...
0
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0answers
99 views

Unable to load shapefiles fully using shapefile.py

I am trying to load my shapefiles directly via Python rather than loading them from Arc Catalog to ArcMAP. I load these modules first: import sys import os import arcpy import numpy Then I add a ...
2
votes
0answers
68 views

Switching from ArcDesktop to ArcGIS Online

I have many GIS files that I was using to create some maps for my work. Our desktop version of ArcGIS expired and we decided to move to the basic online version. I am unable to upload any of my ...
0
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1answer
359 views

Clip a shapefile based on raster extent with high accuracy

I am trying to clip a shapefile based on the extents of a smaller raster. I find the extent of the raster using this code: Extents = arcpy.sa.Raster(MyRaster).extent` Then, I use these lines to ...
0
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1answer
689 views

Why are map tiles being repeated? Using MapServer and Openlayers

Problem I have: map tiles from my layer are being repeated. Shapefile is projection 3059. I have specified 3059 is in the mapfile and also when creating map object. I know OpenLayers.Layer.WMS is ...
9
votes
2answers
3k views

How to split non-contiguous feature in QGIS?

I have a shapefile with a feature that is non-contiguous. I want to split the areas on the left from the area on the right. However, QGIS's Split Features tool requires you to draw a line over the ...
3
votes
1answer
96 views

Statistical Analysis of Shapefile Proximity within Raster Image - ArcMap10.1

I have a raster image that has been reclassified into 15 equally incremented values/levels. This raster represents "sinkhole risk" in a certain county. So level 1 is the lowest risk region and level ...
1
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1answer
73 views

Why does QGIS add decimals when a csv is saved as a shapefile?

When I save a csv as shapefile the fields with decimals are saved adding decimals, then the new table in some case has new values. Old Table (CSV) ALTURA ELI ALTURA ORT 1.94 39.6 -11.19 ...
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votes
2answers
95 views

How to add .shp file to ArcMap? [closed]

Ive spent the last 12 hours trying to figure out how to use ArcMap. Ive made about 2% progress. I attached the link to the .shp files at the bottom. Ive been exporting .shp files via Pathfinder ...
0
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1answer
241 views

Creating a 10-mile radius buffer zone that averages a variable in my shapefile?

I´m trying to create a "buffer zone" for every polygon in my shapefile, which will identify a 10 mile radius around the centroid of each polygon, and calculate the AVERAGE "demand for services" (one ...
1
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1answer
1k views

FME Workbench: Merging Multiple Shapefiles into One Database Table

I'm new to FME Workbench, but have used Quick Translator for a while. What I have is a directory: C:\Mexico\Maps\Rural where I’ve extracted the Shapefiles for multiple states. Nothing else is in that ...
1
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2answers
47 views

Is convention to denote Building Elevation with respect to ground or sea level?

Have a query on shapefile. I have a shapefile containing a number of polygon features representing buildings. I am trying to extract the elevation of the building. I would like to know if the usual ...
0
votes
1answer
96 views

gdal_rasterize : getting area not in or touching polygon (options -at and -i)

I would like to capture the area that is not in a polygon (option -i) and that doesn't touch that polygon. gdal_rasterize -at will return the polygon + edges, but gdal_rasterize -at -i will not ...
4
votes
1answer
634 views

Allowing user to download shape files via geoserver

We provide layers via shape files and/or PostGIS PostGreSQL Database in geoserver-2.x.x with GCS Geometry. geoserver-2.x.x itself uses this shape files to render maps. The shape files are located on ...
0
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0answers
251 views

How to convert Mapinfo “.Map” file (without .TAB) into SHP?

I've got several MapInfo files but i don't have the .TAB. I only have: M044.DAT M044.ID M044.IND M044.MAP I need to convert these files to SHP. I tried to read those files with MapInfo ...
16
votes
2answers
7k views

Using R to calculate the area of multiple polygons on a map that intersect with another overlaid polygon

I have a shapefile downloaded from the Ordnance Survey that gives electoral ward (division) boundaries for a county of the United Kingdom. I have successfully used R to load the shapefile and plotted ...
0
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1answer
119 views

Optimum set up for large data sets such as mobile service coverage maps [closed]

When serving up large data sets such as mobile coverage maps (custom tile) mashed up with MapQuest maps and MapQuest POIs, is there any performance benefit to using shape file VS WMS tile PNGs? Any ...
1
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1answer
760 views

Version problems with Geotools CSV2SHP example

I'm trying to use the CSV2SHP tutorial. I spent some time trying to get it to run but using v10.x of Geotools causes the shapefile to be output with no geometries. For instance if I open it in QGIS, ...
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2answers
492 views

Geotools writing shapefiles without geometries [duplicate]

When I am writing a shapefile according to CSV2SHP tutorial, it contains features without geometries. I use version 10-SNAPSHOT. For example the result of ogrinfo looks like below: D:\>ogrinfo ...
4
votes
2answers
1k views

Is it possible to route shapefiles using python and without ArcGIS, QGIS, or Pgrouting?

The question is pretty much in the title. Is there a way to route through a road line shapefile using python and some library without having to resort to converting the data into PostGIS/pgrouting or ...
1
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2answers
628 views

Load .shp file in Hive(Hadoop)

I need to load .shp files in Hive more precisely in HortonWorks sandbox through Beeswax, can anyone provide example of Hive commands or steps for Beeswax ?
3
votes
1answer
298 views

How to match google openlayer and shapefile data?

i've installed openlayers plugin and opened google satellite layer in qgis. for a point in beijing china. it's show 12961957,4852605 coordinate in blew status bar. and it should be ...