39
votes
4answers
2k views

What are the FOSS equivalents to these ArcGIS products?

I'm a long-term user of ESRI software, and I now have a need to use free and open source software. I've been reading about Open Layers, PostgreSQL, PostGIS, GeoServer and MapServer but I can't find ...
1
vote
1answer
46 views

python application extension onCreateFeature

Trying to populate certain attributes as soon as a feature is created. I have tried the python add-in application extension function "onCreateFeature", which does get triggered when a feature is ...
1
vote
1answer
26 views

Plot shapefile with matplotlib

I am trying to read a shapefile and plot it using matplotlib. Here is the code: import matplotlib.pyplot as plt import shapefile shpFilePath = "D:\test.shp" listx=[] listy=[] test = ...
0
votes
1answer
144 views

Mapinfo Runtime is throwing error

when i am trying to call MapInfo from my PowerBuilder application, With map info pro(full) version "Open table" command is working fine but with mapinfo runtime(proviewer) "Open table" is crashing ...
1
vote
2answers
26 views

Problem in importing shapefile to Postgis with postgis Shapefile manager

i have a problem with importing my shapefile to postgreSQL, it's a poroblem with the encoding, here's the screenshot: i tried to change encodingin "options" buti get this message: "Failed in ...
0
votes
1answer
172 views

Dissolve multiple rows straight into one layer and add OIDs into table

I am currently running this script to direct multiple dissolves of a polygon layer FC = "BLPUsCavPlace" TABLE = "BLPUsCavPlaceContigBLPUs" FIELDS = ["blpuid", "contigid"] with ...
0
votes
1answer
21 views

Why can't I use AddField_management in ArcPy?

I get this error, when I try to run this ArcPy code in Eclipse PyDev. The red underline under SearchCursor is not important, the Eclipse doesn't recognise the import, but that works perfectly (sure, ...
1
vote
0answers
20 views

QGIS and GRASS r.fill.dir processing times

I am new to the open source software and have performed analysis in ArcGIS in the past. I am learning as I go on this processes for OS. I am trying to calculate stream order (strahler) on a 1 gig ...
1
vote
0answers
19 views

Longest Common Subsequence for trajectory matching in Python

Is there any fast implementation of the Longest Common Subsequence algorithm for trajectory matching in Python? Ideally it would work with trajectories of different length in 2d spaces.
0
votes
1answer
10 views

unit of point radius in OpenLayers.js

What is the unit of measurement for pointRadius in the code bellow? var dotStyle = new OpenLayers.StyleMap({ pointRadius: 5, }); I mean what does 5 represent? 5pixels or 5mm? or ...
5
votes
1answer
174 views

How can I exclude a field on a table from being copied?

I have a query "layer": >>> r = arcpy.MakeQueryLayer_management(r'C:\path\to\connection\file\connection.sde', 'TEST', 'SELECT T.ID AS OBJECTID, T.* FROM MY_TABLE T WHERE T.SOME_COLUMN = 1', ...
0
votes
0answers
17 views

arcmap display full date

I am working with arcmap software. I have a points layer that was created from a gps device. this layer contains a few tracks from the same day (e.g driving to work in the morning, returning home, ...
4
votes
1answer
106 views

Determining size of grid cells created by vector grid tool of QGIS?

I am working with QGIS 1.8.0 and Im making a vector grid on a map. Does someone know how big are the squares if the grid settings look like in the picture?
0
votes
0answers
11 views

Choosing time frame for change detection analysis?

May i know if there is any standard time scale on which change of land use/cover should be analysed? I have a difficulty choosing the time frame for my analysis. I mean how far apart do the years ...
2
votes
1answer
122 views

Displaying coordinate references in GeoTools?

I'm using this library to finish my final project and I have to say I'm no familiar with the maps worlds. My question is if geotools has a method to show automatically the coordinates references in ...
0
votes
3answers
41 views

How to calculate the center and radius of a circle based on points

I have a set of lat/long points. I need to calculate the center point and radius of a circle that will encompass all the points. The co-ordinate system used is latitude/longitude as per google maps. ...
1
vote
2answers
126 views

AML routines and python

I´m trying to use some AML files in ArcMap 10, but I have noticed that this option is not available for this version. Does anyone know or tried to "translate" the aml sequences to another language ...
3
votes
0answers
43 views

simple raster format to use in Web applications?

I'm building a Web application in which users create and edit very coarse raster data. They're assigning values to cells in a georeferenced grid. Right now I'm storing the values in a multidimensional ...
1
vote
1answer
118 views

Dividing map into features (whole squares)

I'm using QGIS 1.8.0. I divided a map of a state with its municipalities into many features using a GRID (small squares), but instead of creating one ID per feature (one ID per square), it creates one ...
2
votes
2answers
62 views

Can we no longer reference an ArcMap layer to get the spatial reference?

I'm currently using ArcGIS 10.2.1. In previous custom geoprocessing tools, I've used the following code to create a feature class in-memory, and set the spatial reference using an existing layer in ...
0
votes
1answer
26 views

Water diving and depth measuring equipment

We go to villages and forest to deepwell rig for water. Can anyone help in identifying a GPS and water depth measurement devices please? we do 4-6" deepwell rigging for ground water in mozambique ...
2
votes
1answer
108 views

how to pin point type layer details on map using ms4w map server

My aim is to create pin point on map and when click event on that pin point to show some details about that point (like shop name ,street name). My point shape file is for rendering on the map i ...
1
vote
1answer
11 views

Rasters change pixel size and range of values when imported into QGIS

I have observed that when I import rasters into QGIS their pixel size changes and also, the full range of the raster's value does not appear. For instance, I may have a raster with values ranging from ...
3
votes
1answer
22 views

Direct Geodesic with Point 2 Azimuth

I am trying to find a way to calculate the direct problem on the WGS-84 ellipsoid but instead of using the initial Azimuth (e.g. lat1, lon1, distance, fwd azi), I want to compute it with the reverse ...
0
votes
1answer
19 views

Error using arcpy.da.SearchCursor and MakeFeatureLayer

im trying to write a script that allows me to iterate through my map layers, and for each layer, iterate over each feature and add a field that gives the location of the feature using my index layer ...
-5
votes
1answer
39 views

From what latitude can you only travel south? [on hold]

From what latitude can you only travel south, and from what latitudes can you only travel north? This question is probably extremely easy and I'm just over thinking it. Some explanations would be ...
1
vote
1answer
129 views

Is it possible to draw polygons along Google Maps Polyline?

Web application has option that user draws polyline on Google Map. After he draws it, there is a button 'Add polygons', which should draw polygons along that line, based on some width and height in ...
0
votes
1answer
62 views

Change marker's size by with zoom in Leaflet

I get stuck with changing my marker's size when zoom changes in my Leaflet code. It's a simple map with a metro stations overlay coming from an ArcGIS Server. The markers are coming from that same ...
0
votes
3answers
27 views

Save rasters created by loop operation to different directory?

I have a set of rasters. I crop them all using FOR loop. Then, I want to save new-created rasters in new directory, not in my actual directory. For one raster it is easy: writeRaster(raster1, ...
1
vote
0answers
13 views

Connect two contour line with calculated line lenght

Is it possible to make plugin for qgis like PEGGER for arcview 3.2? Problem is, how to make path over contour lines with a grade in percent Formula is: K= e*100/G*M ; K=10*100/0.08*10000=1.25m K- ...
5
votes
2answers
518 views

Load and display a layer using PYQGIS

I'm having a go at using pyqgis from within the QGIS python console to load a layer from SQL Server and display it. I feel like I'm part way there but I'm having a real issue getting the layer to ...
0
votes
1answer
96 views

OpenLayers Drag&Drop a pin to select position?

Is there an OpenLayers example that allows the user to set a position with drag&drop. I would like to have a pin and set the position after the user drags & drops the pin to a new position.
1
vote
1answer
285 views

How to write GML and GeoJSON features while retaining attributes in .NET?

I am developing a .NET project [C#] that needs to export/write features as GML and GeoJSON, including, of course, the attributes; data could queried by a database or manually entered. I checked ...
6
votes
2answers
263 views

How to load a raster layer at the top of the QGIS ToC?

The following code inserts my new_layer just above the active layer in the QGIS ToC. new_layer = iface.addRasterLayer(...) Instead, I'd like my new_layer to be inserted at the top of the QGIS ToC. ...
6
votes
1answer
472 views

Determining Natural Origin for a GeoTIFF file (Lambert Conic)

I am trying to display an existing GeoTIFF file (from the FAA WAC set) in an application that requires the GeoTIFF NaturalOriginLongitude tag (FalconView 5.1.1). There are some older files in that set ...
1
vote
1answer
34 views

How to create a text file containing layer names in QGIS?

My QGIS ToC contains layer groups and some layers that do not belong to any group. I would like to create a text file containing the name of those layers that do not belong to any group. Is there an ...
1
vote
1answer
197 views

How to use OpenLayers Geolocate with the OpenGeo Suite Client SDK?

I’d like to have GPS functionality added to my OpenGeo Suite Client SDK application. From what I understand it should be possible to use the Geolocate control from OpenLayers. Preferably there ...
4
votes
3answers
61 views

How can I export data containing umlauts from PostGIS to shapefile, without losing the umlauts?

I am exporting my Finnish (Finland) data from PostGIS to esri shapefile. I am using the PostGIS Shapefile Import/Export Manager and I don't see any way to specify the encoding of the shapefile's ...
0
votes
1answer
92 views

GeoDjango: Only numeric values of degree units are allowed on geographic DWithin queries

I'm trying to get N points within 5000 meters of a certain point. My database is Postgres(PostGis). I have a model like this: class Theatre(models.Model): geom = models.PointField(srid=4326, ...
0
votes
0answers
51 views

Borderlines of states subdividing my GRID

![enter image description here][2]I just merged a map of a country with its states, so I went from having 1 feature (the whole country) to 32 features. Is there any way to have the borders of the ...
0
votes
1answer
76 views

How to know the real size of grid? [duplicate]

Im working with QGIS. When dividing a map with a grid I set in the paramters X=0.1 and Y=0.1. Could someone please explain what does that mean? I mean would the map be divided into 100mx100m squares? ...
0
votes
1answer
198 views

Polygon grid shape file for landmass

I am interested in generating a polygon grid shape file for the landmass of the world. What I have presently is two tables in postgreSQL. Table 1: Coastal area shapefile ...
1
vote
1answer
139 views

Is there any readily available implementation of Mapserver (or Geoserver)- Postgres-Openlayers combination?

I am developing an web GIS for map data presentation for public. Is there any readily available implementation of Mapserver (or Geoserver)- Postgres-Openlayers combination or similar? More Details: ...
4
votes
1answer
1k views

Forcing long layer names to multiple lines based on specified legend width in ArcGIS Desktop?

Do to various limitations I almost always create static (graphic) legends but I do have the occasional map where impeccable cartography is secondary to functionality hence a dynamic legend is ...
3
votes
1answer
974 views

How to allow for multiple lines in legend?

How can I force the description text in my legend to occupy more than one line? This is basically the same question as Legend: Can I force long layer names to multiple lines based on a specified ...
0
votes
2answers
37 views

Long description layer in legend of ArcGIS for Desktop? [duplicate]

I work with arcview 10.3 and i have layer with long description (green),hence the legend spread throw out the map: I have to use a singel symbol for the layer and not use the unique value as ...
0
votes
0answers
13 views

Exporting spatial object in mysql to shapefile with spatial reference

Info: Win7, MySQL 5.x and OSGEO4W 1.11 To import a shapeafile to MySQL I use this ogr2ogr command: ogr2ogr -f MySQL MySQL:gis,user=root,password=password C:\posto_pianco.shp -nln pianco_post -a_srs ...
3
votes
2answers
29 views

Similar function of ArcGIS Network Analyst in MapInfo

I am currently using MapInfo and trying to create a road network base walking catchment map, rather than just a cycle buffer. The finished plan should look similar as follows. This map was created ...
1
vote
1answer
572 views

Linux Client for OpenGTS server

I've installed an OpenGTS server and successfully linked it with the GPS2OpenGTS_Pro application for android. The buses I'm tracking offer 3G with a wireless AP, however whenever the bus stops, the ...
0
votes
0answers
15 views

Geonetwork javascript API

I'm currently developing a web map application using GeoExt javascript API. The web map application is supposed to give lists of available WMS layers in a Grid panle through the help of GeoExt's ...

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