Top new questions this week:

What is a good resource for learning to hand draw a map?

I've been wanting to go old school & draw some maps by hand... Something like you might see on the first page of an adventure novel. I've found next to nothing on the web and am hoping that one of …

cartography art

asked by BrianPeasley 12 votes answered by J-roc 6 votes

Proper workflow for LAS to DEM conversion

I regularly come across LiDAR (.LAS) files with elevation data. When I do, I always struggle to find a way of converting them to a DEM for hydrological analysis. I have developed several workflows, …

arcgis-desktop convert dem hydrology las

asked by Martin 9 votes

A good tutorial for Openlayers

I need to create a web map showing many raster layers. I am using mapserver and want to use Openlayers, however I can't find any good tutorial about it. I see a couple of old questions (1 and 2) …

openlayers tutorial

asked by nadya 5 votes answered by Julien-Samuel Lacroix 3 votes

Does France have addressing products similar to British AddressBase?

In Britain people can license the Ordnance Survey's AddressBase product, which provides a list of almost all the country's addresses, with good building location accuracy even for remote country …

geocoding ordnance-survey address street-address france

asked by GeoDave 4 votes answered by Mapperz 2 votes

Convert linear polygons to lines

Hi I have some long linear polygons that I'd rather store as lines but I'm not sure how best to do this. Ideally I'd have a line goiung through the centre of the polygon lenthways. I have two ideas of …

arcgis-desktop arcpy modelbuilder convert

asked by whatahitson 4 votes answered by MAJ742 5 votes

What PostGIS [topology] provided tools may be used for data quality assurance?

I'm learning about techniques to ensure GIS data quality. Googling around, I've found a few papers about theory and best practices (here and here), and a couple of short presentations about the topic …

postgis-2.0 topology data-quality

asked by jorgeas80 4 votes

Join Tables related by a composite primary key in qgis

I have two tables, one has the geometry and other has attributes. The table with geometry has unique number primary key, and 4 columns admin1,admin2,admin3,featureid. Table two is a csv file has the …

qgis attributes joins table composite-key

asked by neogeomat 4 votes answered by underdark 2 votes

Greatest hits from previous weeks:

ArcMap 10: Labels not appearing

Not sure what the issue is, but I'm unable to get labels to display in Arcmap 10. The obvious things are accounted for (as far as I know). Labels are set in Properties, layers are checked to label in …

arcgis labeling

asked by Jacques Tardie 10 votes answered by Jacques Tardie 2 votes

Why does PostGIS installation not create a template_postgis

I went this route for installation of PostgreSQL and PostGIS: PostgreSQL using the standalone KyngChaos, PostGIS install from KyngChaos as well... pgAdmin3 from PostgreSQL Tools Now when I launch …

postgis postgresql

asked by Michael Markieta 13 votes answered by underdark 13 votes

Can you answer these?

How to make work tablet integrated GNSS (GPS) on Windows 8 with QGIS?

I have tablet - Dell latitude 10, running Windows 8, with integrated Broadcom GNSS Receiver BCM47511 (GPS,Glonass...). Because it is integrated GPS and Windows 8, there is the "new" way of providing …

qgis gps windows8 tablet gnss

asked by Miro 3 votes

Image Service Descriptions

When you load an image service to ArcServer, you have the option to place an Item Description with the service. This acts as the metadata, however it displays a duplicate: "Service Description" then …

arcgis-server image-service

asked by LMHall 2 votes

choosing the right parameters to interpolate a DEM form contours

this is my first question on the forums, so be gentle :) I have a 5 meter interval contour lines feature class which i would like to interpolate to a DEM. I am well aware of at least 2 tools ("tin …

dem

asked by user24379 2 votes